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Fuentes R, Marlow FL, Abrams EW, Zhang H, Kobayashi M, Gupta T, Kapp LD, DiNardo Z, Heller R, Cisternas R, García-Castro P, Segovia-Miranda F, Montecinos-Franjola F, Vought W, Vejnar CE, Giraldez AJ, Mullins MC. Maternal regulation of the vertebrate oocyte-to-embryo transition. PLoS Genet 2024; 20:e1011343. [PMID: 39052672 DOI: 10.1371/journal.pgen.1011343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/06/2024] [Accepted: 06/13/2024] [Indexed: 07/27/2024] Open
Abstract
Maternally-loaded factors in the egg accumulate during oogenesis and are essential for the acquisition of oocyte and egg developmental competence to ensure the production of viable embryos. However, their molecular nature and functional importance remain poorly understood. Here, we present a collection of 9 recessive maternal-effect mutants identified in a zebrafish forward genetic screen that reveal unique molecular insights into the mechanisms controlling the vertebrate oocyte-to-embryo transition. Four genes, over easy, p33bjta, poached and black caviar, were found to control initial steps in yolk globule sizing and protein cleavage during oocyte maturation that act independently of nuclear maturation. The krang, kazukuram, p28tabj, and spotty genes play distinct roles in egg activation, including cortical granule biology, cytoplasmic segregation, the regulation of microtubule organizing center assembly and microtubule nucleation, and establishing the basic body plan. Furthermore, we cloned two of the mutant genes, identifying the over easy gene as a subunit of the Adaptor Protein complex 5, Ap5m1, which implicates it in regulating intracellular trafficking and yolk vesicle formation. The novel maternal protein Krang/Kiaa0513, highly conserved in metazoans, was discovered and linked to the function of cortical granules during egg activation. These mutant genes represent novel genetic entry points to decipher the molecular mechanisms functioning in the oocyte-to-embryo transition, fertility, and human disease. Additionally, our genetic adult screen not only contributes to the existing knowledge in the field but also sets the basis for future investigations. Thus, the identified maternal genes represent key players in the coordination and execution of events prior to fertilization.
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Affiliation(s)
- Ricardo Fuentes
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Florence L Marlow
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine Mount Sinai, New York, New York, United States of America
| | - Elliott W Abrams
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
- Department of Biology, Purchase College, State University of New York, Purchase, New York, United States of America
| | - Hong Zhang
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Manami Kobayashi
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Tripti Gupta
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Lee D Kapp
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Zachary DiNardo
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Ronald Heller
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Ruth Cisternas
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Priscila García-Castro
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Fabián Segovia-Miranda
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Felipe Montecinos-Franjola
- Laboratory of Cell Structure and Dynamics, National Institute on Deafness and Other Communication Disorders (NIDCD), National Institutes of Health, Bethesda, Maryland, United States of America
| | - William Vought
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Charles E Vejnar
- Department of Genetics, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Antonio J Giraldez
- Department of Genetics, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Mary C Mullins
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
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Boylan CF, Sambo KM, Neal-Perry G, Brayboy LM. Ex ovo omnia-why don't we know more about egg quality via imaging? Biol Reprod 2024; 110:1201-1212. [PMID: 38767842 PMCID: PMC11180616 DOI: 10.1093/biolre/ioae080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 05/22/2024] Open
Abstract
Determining egg quality is the foremost challenge in assisted reproductive technology (ART). Although extensive advances have been made in multiple areas of ART over the last 40 years, oocyte quality assessment tools have not much evolved beyond standard morphological observation. The oocyte not only delivers half of the nuclear genetic material and all of the mitochondrial DNA to an embryo but also provides complete developmental support during embryonic growth. Oocyte mitochondrial numbers far exceed those of any somatic cell, yet little work has been done to evaluate the mitochondrial bioenergetics of an oocyte. Current standard oocyte assessment in in vitro fertilization (IVF) centers include the observation of oocytes and their surrounding cell complex (cumulus cells) via stereomicroscope or inverted microscope, which is largely primitive. Additional oocyte assessments include polar body grading and polarized light meiotic spindle imaging. However, the evidence regarding the aforementioned methods of oocyte quality assessment and IVF outcomes is contradictory and non-reproducible. High-resolution microscopy techniques have also been implemented in animal and human models with promising outcomes. The current era of oocyte imaging continues to evolve with discoveries in artificial intelligence models of oocyte morphology selection albeit at a slow rate. In this review, the past, current, and future oocyte imaging techniques will be examined with the goal of drawing attention to the gap which limits our ability to assess oocytes in real time. The implications of improved oocyte imaging techniques on patients undergoing IVF will be discussed as well as the need to develop point of care oocyte assessment testing in IVF labs.
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Affiliation(s)
- Caitlin F Boylan
- University of North Carolina, Chapel Hill, NC, USA
- Eastern Virginia Medical School, Norfolk, VA, USA
| | - Keshia M Sambo
- Institute for Biochemistry and Biology, University of Potsdam, Potsdam, Germany
| | | | - Lynae M Brayboy
- Department of Neuropediatrics Charité-Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Klinik für Pädiatrie m. S. Neurologie, Charité Campus Virchow Klinikum, Berlin, Germany
- Department of Reproductive Biology, Bedford Research Foundation, Bedford, MA, USA
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3
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Zhao H, Zhang H, Zhou Y, Shuai L, Chen Z, Wang L. Deletion of Fbxw7 in oocytes causes follicle loss and premature ovarian insufficiency in mice. J Cell Mol Med 2024; 28:e18487. [PMID: 39031722 PMCID: PMC11190952 DOI: 10.1111/jcmm.18487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 04/24/2024] [Accepted: 05/28/2024] [Indexed: 07/22/2024] Open
Abstract
Premature ovarian insufficiency (POI) is one of the important causes of female infertility. Yet the aetiology for POI is still elusive. FBXW7 (F-box with 7 tandem WD) is one of the important components of the Skp1-Cullin1-F-box (SCF) E3 ubiquitin ligase. FBXW7 can regulate cell growth, survival and pluripotency through mediating ubiquitylation and degradation of target proteins via triggering the ubiquitin-proteasome system, and is associated with tumorigenesis, haematopoiesis and testis development. However, evidence establishing the function of FBXW7 in ovary is still lacking. Here, we showed that FBXW7 protein level was significantly decreased in the ovaries of the cisplatin-induced POI mouse model. We further showed that mice with oocyte-specific deletion of Fbxw7 demonstrated POI, characterized with folliculogenic defects, early depletion of follicle reserve, disordered hormonal secretion, ovarian dysfunction and female infertility. Impaired oocyte-GCs communication, manifested as down-regulation of connexin 37, may contribute to follicular development failure in the Fbxw7-mutant mice. Furthermore, single-cell RNA sequencing and in situ hybridization results indicated an accumulation of Clu and Ccl2 transcripts, which may alter follicle microenvironment deleterious to oocyte development and accelerate POI. Our results establish the important role of Fbxw7 in folliculogenesis and ovarian function, and might provide valuable information for understanding POI and female infertility.
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Affiliation(s)
- Huihui Zhao
- Department of Cell Biology, School of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdongP.R. China
- Guangdong Provincial People's HospitalSouthern Medical UniversityGuangzhouGuangdongP.R. China
| | - Hanbin Zhang
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education InstitutesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdongP. R. China
| | - Yuxia Zhou
- Department of Obstetrics and Gynecology, Guangdong Second Provincial General HospitalGuangzhouGuangdongP.R. China
| | - Ling Shuai
- Department of Reproductive medicine, Shenzhen Second People's HospitalShenzhenGuangdongP.R. China
| | - Zhenguo Chen
- Department of Cell Biology, School of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdongP.R. China
| | - Liping Wang
- Department of Reproductive medicine, Shenzhen Second People's HospitalShenzhenGuangdongP.R. China
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4
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Kim TE, Lee HK, Jee BC. Clinical and laboratory factors associated with the presence of dysmorphic oocytes in intracytoplasmic sperm injection cycles. Clin Exp Reprod Med 2023; 50:270-276. [PMID: 37995755 DOI: 10.5653/cerm.2023.06030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 07/10/2023] [Indexed: 11/25/2023] Open
Abstract
OBJECTIVE This study investigated the clinical and laboratory factors associated with the presence of dysmorphic oocytes in intracytoplasmic sperm injection (ICSI) cycles. METHODS The study involved 200 ICSI cycles, performed from 2020 to 2021, that yielded at least one mature oocyte. Clinical characteristics and ovarian stimulation methods were compared between 68 cycles with at least one dysmorphic oocyte (the dysmorphic group) and 132 cycles with normal-form oocytes only (the non-dysmorphic group). Dysmorphic oocytes were characterized by dark cytoplasm, cytoplasmic granularity, cytoplasmic vacuoles, refractile bodies in the cytoplasm, smooth endoplasmic reticulum in the cytoplasm, an oval shape, an abnormal zona pellucida, a large perivitelline space, debris in the perivitelline space, or an abnormal polar body. RESULTS The ages of the women, indications for in vitro fertilization, serum anti-Müllerian hormone levels, and rates of current ovarian endometrioma were similar between the dysmorphic and non-dysmorphic groups. In both groups, the three ovarian stimulation regimens, two types of pituitary suppression, and total gonadotropin dose were employed similarly. However, the dual-trigger method was used more frequently in the dysmorphic group (67.6% vs. 50%, p=0.024). The dysmorphic group contained significantly more immature oocytes and exhibited significantly lower oocyte maturity (50% vs. 66.7%, p=0.001) than the non-dysmorphic cycles. Within the dysmorphic group, significantly lower oocyte maturity was found in the cycles using a dual-trigger, but not in those with a human chorionic gonadotropin trigger. CONCLUSION ICSI cycles with dysmorphic oocytes are closely associated with reduced oocyte maturity. This association was observed exclusively in dual-trigger cycles.
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Affiliation(s)
- Tae Eun Kim
- Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Hyun Kyung Lee
- Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Byung Chul Jee
- Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea
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5
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Braga DPAF, Setti A, Morishima C, Provenza RR, Iaconelli A, Borges E. The effect of sperm DNA fragmentation on ICSI outcomes depending on oocyte quality. Andrology 2023; 11:1682-1693. [PMID: 37004191 DOI: 10.1111/andr.13435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 03/21/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
BACKGROUND Sperm deoxyribonucleic acid (DNA) fragmentation is commonly encountered in spermatozoa, and the oocyte assumes responsibility for repairing sperm DNA fragmentation during the oocyte-embryo transition. OBJECTIVES This study aimed to investigate whether the effect of sperm DNA fragmentation on intracytoplasmic sperm injection outcomes depends on the incidence of oocyte dimorphisms. MATERIALS AND METHODS For the present cohort, 2942 fertilized oocytes from 525 patients submitted to intracytoplasmic sperm injection cycles were assessed. The present study was conducted in a private in vitro fertilization center affiliated to a university from June 2016 to July 2019. Semen samples were divided into the following two groups depending on the sperm DNA fragmentation index: a low fragmentation index group (<30% sperm DNA fragmentation, n = 1468) and a high fragmentation index group (≥30% sperm DNA fragmentation, n = 486). In addition, mature oocytes were examined before sperm injection, and intracytoplasmic and extracytoplasmic defects were recorded. The effect of the sperm DNA fragmentation index on laboratory and clinical intracytoplasmic sperm injection outcomes (depending on the presence of oocyte defects) was evaluated. RESULTS Significant increases in the rates of fertilization, high-quality embryo, implantation, and pregnancy were noted for cycles with <30% sperm DNA fragmentation than cycles with ≥30% sperm DNA fragmentation (regardless of the presence of oocyte dimorphisms). The presence of dimorphisms significantly impacted laboratory and clinical outcomes. The lowest fertilization and high-quality embryo rates were observed when a high sperm DNA fragmentation index was associated with the presence of dark cytoplasm, vacuoles, resistant membrane, and non-resistant membrane. The lowest implantation and pregnancy rates were observed when a high sperm DNA fragmentation index was associated with the presence of vacuoles, defective perivitelline space, and fragmented polar body. The effect of sperm DNA fragmentation on miscarriage rates was significantly influenced by the presence of centrally located cytoplasmic granulation, a defective perivitelline space and non-resistant membrane. CONCLUSION A high sperm DNA fragmentation index increases the likelihood of miscarriage in intracytoplasmic sperm injection cycles, an effect that may potentially be magnified by the presence of oocyte dysmorphisms.
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Affiliation(s)
| | | | - Christina Morishima
- Instituto Sapientiae-Centro de Estudos e Pesquisa em Reprodução Assistida, Sao Paulo, Brazil
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Sciorio R, Cariati F, Fleming S, Alviggi C. Exploring the Impact of Controlled Ovarian Stimulation and Non-Invasive Oocyte Assessment in ART Treatments. Life (Basel) 2023; 13:1989. [PMID: 37895371 PMCID: PMC10608727 DOI: 10.3390/life13101989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/14/2023] [Accepted: 09/27/2023] [Indexed: 10/29/2023] Open
Abstract
Invasive and noninvasive features are normally applied to select developmentally competent oocytes and embryos that can increase the take-home baby rates in assisted reproductive technology. The noninvasive approach mainly applied to determine oocyte and embryo competence has been, since the early days of IVF, the morphological evaluation of the mature cumulus-oocyte complex at the time of pickup, first polar body, zona pellucida thickness, perivitelline space and cytoplasm appearance. Morphological evaluation of oocyte quality is one of the options used to predict successful fertilization, early embryo development, uterine implantation and the capacity of an embryo to generate a healthy pregnancy to term. Thus, this paper aims to provide an analytical revision of the current literature relating to the correlation between ovarian stimulation procedures and oocyte/embryo quality. In detail, several aspects of oocyte quality such as morphological features, oocyte competence and its surrounding environment will be discussed. In addition, the main noninvasive features as well as novel approaches to biomechanical parameters of oocytes that might be correlated with the competence of embryos to produce a healthy pregnancy and live birth will be illustrated.
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Affiliation(s)
- Romualdo Sciorio
- Fertility Medicine and Gynaecological Endocrinology Unit, Department Woman-Mother-Child, Lausanne University Hospital, CHUV, 1011 Lausanne, Switzerland
| | - Federica Cariati
- Department of Public Health, University of Naples Federico II, Via Pansini 5, 80131 Napoli, Italy;
| | - Steven Fleming
- Discipline of Anatomy & Histology, School of Medical Sciences, University of Sydney, Sydney, NSW 2006, Australia;
| | - Carlo Alviggi
- Fertility Unit, Maternal-Child Department, AOU Policlinico Federico II, 80131 Naples, Italy;
- Department of Neuroscience, Reproductive Sciences and Odontostomatology, University of Naples Federico II, 80131 Naples, Italy
- Endocrinology and Experimental Oncology Institute (IEOS), National Research Council, 80131 Naples, Italy
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7
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All that glitters is not gold: a stereological study of human donor oocytes. ZYGOTE 2023; 31:253-265. [PMID: 36938666 DOI: 10.1017/s0967199423000114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Here we report a quantitative analysis of human metaphase II (MII) oocytes from a 22-year-old oocyte donor, retrieved after ovarian-controlled hyperstimulation. Five surplus donor oocytes were processed for transmission electron microscopy (TEM), and a stereological analysis was used to quantify the distribution of organelles, using the point-counting technique with an adequate stereological grid. Comparisons between means of the relative volumes (Vv) occupied by organelles in the three oocyte regions, cortex (C), subcortex (SC) and inner cytoplasm (IC), followed the Kruskal-Wallis test and Mann-Whitney U-test with Bonferroni correction. Life cell imaging and TEM analysis confirmed donor oocyte nuclear maturity. Results showed that the most abundant organelles were smooth endoplasmic reticulum (SER) elements (26.8%) and mitochondria (5.49%). Significant differences between oocyte regions were found for lysosomes (P = 0.003), cortical vesicles (P = 0.002) and large SER vesicles (P = 0.009). These results were quantitatively compared with previous results using prophase I (GV) and metaphase I (MI) immature oocytes. In donor MII oocytes there was a normal presence of cortical vesicles, SER tubules, SER small, medium and large vesicles, lysosomes and mitochondria. However, donor MII oocytes displayed signs of cytoplasmic immaturity, namely the presence of dictyosomes, present in GV oocytes and rare in MI oocytes, of SER very large vesicles, characteristic of GV oocytes, and the rarity of SER tubular aggregates. Results therefore indicate that the criterion of nuclear maturity used for donor oocyte selection does not always correspond to cytoplasmic maturity, which can partially explain implantation failures with the use of donor oocytes.
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8
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Huang HL, Liu HL, Cheng YS. Development of innovative marker detection methods for high-fertility ducks (Anas plastyrhynchos). Theriogenology 2023; 197:275-282. [PMID: 36527864 DOI: 10.1016/j.theriogenology.2022.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 11/27/2022] [Accepted: 12/04/2022] [Indexed: 12/12/2022]
Abstract
We previously analyzed the genome-wide gene expression at the transcription level in pre-hierarchical ovarian follicles (approximate 5 mm in diameter) between two groups of ducks representing high and low fertility. Orthodenticle homeobox 2 (otx2) was identified with significantly differential expression in the high-fertility group versus the low-fertility group. To identify the relationships between genotypes and phenotypes, we recorded the reproductive performance in advance, including fertility, hatchability, and fertile period of female ducks. To ensure coverage of the entire duration of the fertile period, we extended the egg collection period after artificial insemination. Naturally, sperm cannot survive after a certain period of time in the female reproductive tract (sperm is not immortal); therefore, lower average values for fertility were observed in this study than that observed after a normal egg collection period, i.e., the lower average values of fertility (18 days after artificial insemination), were not due to the effect of otx2. The otx2 genomic sequence of Tsaiya ducks was firstly amplified with a primer pair of i3F and i3R for polymerase chain reaction based on Pekin duck sequence and a resultant 444-base pair fragment was obtained for DNA sequencing. Using multiple sequence alignment, new single-nucleotide polymorphisms g.366T > C and g.182G > T were discovered in the otx2 gene. With respect to g.366T > C, ducks were classified into CC, CT, and TT genotypes. For g.182G > T, three genotypes (GG, GT, and TT) were identified. Ducks were genotyped using novel specific primers and probes to rapidly screen their single-nucleotide polymorphisms. The results indicated that ducks with the CC genotype of g.366T > C exhibited the highest fertility among the CC, CT, and TT genotypes (p < 0.05). No significant difference was found in the fertile period and hatchability among three genotypes of g.366T > C. Moreover, no association was found between g.182G > T genotypes and the three reproductive phenotypes examined in this study. Collectively, the otx2 g.366T > C genotype is associated with duck females, and can be used as a marker for farming a flock of ducks with high fertility, as well as for genetic selection of breeders.
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Affiliation(s)
- Hsiu-Lin Huang
- Department of Animal Science, National Chung Hsing University, Taichung, 402, Taiwan.
| | - Hsiao-Lung Liu
- Livestock Research Institute, Council of Agriculture, Hsin-Hua, Tainan, 712, Taiwan
| | - Yu-Shin Cheng
- Livestock Research Institute, Council of Agriculture, Hsin-Hua, Tainan, 712, Taiwan
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9
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Comparing the IVM laboratory outcomes between stimulated IVF with unstimulated natural cycles. ZYGOTE 2022; 30:593-599. [PMID: 35730547 DOI: 10.1017/s0967199421000885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Recently, more attention has been raised towards fertility preservation in women with cancer. One option is in vitro maturation (IVM) of the immature oocytes as there is not enough time for induction of an ovarian stimulation protocol. The aim was to compare the IVM laboratory outcomes between stimulated and unstimulated (natural) in vitro fertilization (IVF) cycles. In total, 234 immature oocytes collected from 15 cancer patients who underwent an IVM programme (natural IVM) and 23 IVF cycles with a controlled ovarian hyperstimulation protocol (stimulated IVM) were analyzed. The oocyte morphology, zona pellucida (ZP), and meiotic spindle presence were measured using PolScope technology. Also, the rates of oocyte maturation and fertilization were assessed in both groups. The IVM rate was higher in the stimulated cycle (P < 0.05), but the fertilization rate was insignificant in comparison with unstimulated cycles. There were no significant differences in the spindle visualization and ZP birefringence scoring between the groups (P > 0.05). The oocyte normal morphology was better in the stimulated cycle compared with the natural cycle (P < 0.05). In conclusion, IVM can be recommended for cancer patients as an alternative treatment when there is insufficient time for conventional IVF before chemotherapy initiation.
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10
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Sciorio R, Miranian D, Smith GD. Non-invasive oocyte quality assessment. Biol Reprod 2022; 106:274-290. [PMID: 35136962 DOI: 10.1093/biolre/ioac009] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/04/2022] [Accepted: 01/11/2022] [Indexed: 12/27/2022] Open
Abstract
Oocyte quality is perhaps the most important limiting factor in female fertility; however, the current methods of determining oocyte competence are only marginally capable of predicting a successful pregnancy. We aim to review the predictive value of non-invasive techniques for the assessment of human oocytes and their related cells and biofluids that pertain to their developmental competence. Investigation of the proteome, transcriptome, and hormonal makeup of follicular fluid, as well as cumulus-oocyte complexes are currently underway; however, prospective randomized non-selection-controlled trials of the future are needed before determining their prognostic value. The biological significance of polar body morphology and genetics are still unknown and the subject of debate. The predictive utility of zygotic viscoelasticity for embryo development has been demonstrated, but similar studies performed on oocytes have yet to be conducted. Metabolic profiling of culture media using human oocytes are also limited and may require integration of automated, high-throughput targeted metabolomic assessments in real time with microfluidic platforms. Light exposure to oocytes can be detrimental to subsequent development and utilization of time-lapse imaging and morphometrics of oocytes is wanting. Polarized light, Raman microspectroscopy, and coherent anti-Stokes Raman scattering are a few novel imaging tools that may play a more important role in future oocyte assessment. Ultimately, the integration of chemistry, genomics, microfluidics, microscopy, physics, and other biomedical engineering technologies into the basic studies of oocyte biology, and in testing and perfecting practical solutions of oocyte evaluation, are the future for non-invasive assessment of oocytes.
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Affiliation(s)
- Romualdo Sciorio
- Edinburgh Assisted Conception Programme, EFREC, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Daniel Miranian
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA
| | - Gary D Smith
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA.,Department of Physiology, Urology, and Reproductive Sciences Program, University of Michigan, Ann Arbor, MI, USA
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11
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Moghadam ARE, Moghadam MT, Hemadi M, Saki G. Oocyte quality and aging. JBRA Assist Reprod 2022; 26:105-122. [PMID: 34338482 PMCID: PMC8769179 DOI: 10.5935/1518-0557.20210026] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 04/15/2021] [Indexed: 11/20/2022] Open
Abstract
It is well known that female reproduction ability decreases during the forth decade of life due to age-related changes in oocyte quality and quantity; although the number of women trying to conceive has today increased remarkably between the ages of 36 to 44. The causes of reproductive aging and physiological aspects of this phenomenon are still elusive. With increase in the women's age, during Assisted Reproductive Technologies (ART) we have perceived a significant decline in the number and quality of retrieved oocytes, as well as in ovarian follicle reserves. This is because of increased aneuploidy due to factors such as spindle apparatus disruption; oxidative stress and mitochondrial damage. The aim of this review paper is to study data on the potential role of the aging process impacting oocyte quality and female reproductive ability. We present the current evidence that show the decreased oocyte quality with age, related to reductions in female reproductive outcome. The aging process is complicated and it is caused by many factors that control cellular and organism life span. Although the factors responsible for reduced oocyte quality remain unknown, the present review focuses on the potential role of ovarian follicle environment, oocyte structure and its organelles. To find a way to optimize oocyte quality and ameliorate clinical outcomes for women with aging-related causes of infertility.
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Affiliation(s)
- Ali Reza Eftekhari Moghadam
- Cellular & Molecular Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mahin Taheri Moghadam
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Masoud Hemadi
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ghasem Saki
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Bartolacci A, Intra G, Coticchio G, dell’Aquila M, Patria G, Borini A. Does morphological assessment predict oocyte developmental competence? A systematic review and proposed score. J Assist Reprod Genet 2022; 39:3-17. [PMID: 34993709 PMCID: PMC8866588 DOI: 10.1007/s10815-021-02370-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/26/2021] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Does existing scientific literature suggest an impact of oocyte dysmorphisms on biological or clinical outcomes of assisted reproduction treatments? METHODS Studies of interest were selected from an initial cohort of 6651 potentially relevant records retrieved. PubMed was systematically searched for peer-reviewed original papers and reviews identified by keywords and medical subject heading (MeSH) terms. The most relevant publications were critically evaluated to identify criteria for oocyte morphological evaluation and IVF outcomes. For each morphological abnormality, we generated an oocyte literature score (OLS) through the following procedure: (a) papers showing a negative, absence of, or positive correlation between a given abnormality and IVF outcome were scored 1, 0, and - 1, respectively; (b) the sum of these scores was expressed as a fraction of all analyzed papers; (c) the obtained fraction was multiplied by 10 and converted into decimal number. RESULT We identified eleven different dysmorphisms, of which six were extracytoplasmic (COC, zona pellucida, perivitelline space, polar body 1, shape, giant size) and five intracytoplasmic (vacuoles, refractile bodies, SER clusters, granularity, color). Among the extracytoplasmic dysmorphisms, abnormal morphology of the COC generated an OLS of 8.33, indicating a large prevalence (5/6) of studies associated with a negative outcome. Three intracytoplasmic dysmorphisms (vacuoles, SER clusters, and granularity) produced OLS of 7.14, 7.78, and 6.25, respectively, suggestive of a majority of studies reporting a negative outcome. CONCLUSION COC morphology, vacuoles, SER clusters, and granularity produced OLS suggestive of a prevalence of studies reporting a negative outcome.
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Affiliation(s)
| | - Giulia Intra
- 9.Baby, Family and Fertility Center, Via Dante 15, Bologna, Italy
| | | | | | - Gilda Patria
- 9.Baby, Family and Fertility Center, Via Dante 15, Bologna, Italy
| | - Andrea Borini
- 9.Baby, Family and Fertility Center, Via Dante 15, Bologna, Italy
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13
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Human Oocyte Morphology and Outcomes of Infertility Treatment: a Systematic Review. Reprod Sci 2021; 29:2768-2785. [PMID: 34816375 DOI: 10.1007/s43032-021-00723-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 08/22/2021] [Indexed: 10/19/2022]
Abstract
Oocyte morphology assessment is easy to implement in any laboratory with possible quality grading prior to fertilization. At present, comprehensive oocyte morphology scoring is not performed as a routine procedure. However, it may augment chances for successful treatment outcomes if a correlation with certain dysmorphisms can be proven. In order to determine a correlation between oocyte morphology and treatment outcome, we performed a systematic search in PubMed and Cochrane Controlled Trials Register following PRISMA guidelines. A total of 52 articles out of 6,755 search results met the inclusion criteria. Dark colour of the cytoplasm (observed with an incidence rate of 7%), homogeneous granularity of the cytoplasm (19%) and ovoid shape of oocytes (7%) appeared to have no influence on treatment outcome. Abnormalities such as refractile bodies (10%), fragmented first polar body (37%), dark zona pellucida (9%), enlarged perivitelline space (18%) and debris in it (21%) are likely to affect the treatment outcome to some extent. Finally, cytoplasmic vacuoles (4%), centrally located cytoplasmic granularity (12%) and clusters of smooth endoplasmic reticulum (4%) negatively impact infertility treatment outcomes. Nonetheless, morphological assessment is informative rather than predictive. Adding oocyte morphology to the artificial intelligence (AI)-driven selection process may improve the precision of the algorithms. Oocyte morphology assessment can be especially useful in oocyte donation cycles, during oocyte freezing for fertility preservation and finally, objective oocyte scoring can be important in cases of very poor treatment outcome as a tool for explanation of results to the patient.
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Robin C, Uk A, Decanter C, Behal H, Collinet P, Rubod C, Barbotin AL, Robin G. Impact of endometriosis on oocyte morphology in IVF-ICSI: retrospective study of a cohort of more than 6000 mature oocytes. Reprod Biol Endocrinol 2021; 19:160. [PMID: 34656130 PMCID: PMC8522159 DOI: 10.1186/s12958-021-00798-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/11/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Infertility associated with endometriosis can be explained by several non-exclusive mechanisms. The oocyte plays a crucial role in determining embryonic competence and this is particularly relevant for in vitro fertilization (IVF) outcomes. According to some authors, the morphology of oocytes could also be a non-invasive marker of oocyte quality. The aim of this study was to evaluate the relationship between endometriosis and oocyte morphology after controlled ovarian stimulation for intracytoplasmic sperm injection (ICSI) on a large oocyte cohort. METHODS Single-center comparative retrospective study in the academic In Vitro Fertilization (IVF) unit of the Lille University Hospital. A total of 596 women treated for IVF-ICSI with ejaculated spermatozoa for sperm alterations were included. They were classified as endometriosis (n = 175) or control groups (n = 401). The morphological evaluation of 2,016 mature oocytes from 348 cycles of patients with endometriosis was compared with that of 4,073 mature oocytes from 576 control cycles. The main outcome measures were Average Oocyte Quality Index (AOQI) and metaphase II oocyte morphological scoring system (MOMS). Comparison of groups was carried out by a mixed linear model and by a generalized estimation equation model with a "patient" random effect to consider that a patient might have several attempts. RESULTS No difference in AOQI and MOMS scores was found between endometriosis and control women (adjusted p = 0.084 and 0.053, respectively). In case of endometriosis, there were significantly fewer metaphase II oocytes retrieved, embryos obtained, grade 1 embryos and number of cumulative clinical pregnancies compared to controls. In the endometriosis group, endometriosis surgery was associated with a reduced number of mature oocytes retrieved, and the presence of endometrioma(s) was associated with some abnormal oocyte shapes. Nevertheless, no difference concerning the AOQI and MOMS scores was found in these subgroups. CONCLUSION Endometriosis does not have a negative impact on oocytes' morphology in IVF-ICSI. TRIAL REGISTRATION On December 16, 2019, the Institutional Review Board of the Lille University Hospital gave unrestricted approval for the anonymous use of all patients' clinical, hormonal and ultrasound records (reference DEC20150715-0002).
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Affiliation(s)
- Camille Robin
- Service de Gynécologie Endocrinienne Et Médecine de La Reproduction, CHU Lille, Assistance Médicale À La Procréation Et Préservation de La Fertilité, Hôpital Jeanne de Flandre, Service dAvenue Eugène Avinée, 59000, Lille, France.
| | - Audrey Uk
- Institut de Biologie de La Reproduction-Spermiologie-CECOS, Hôpital Jeanne de Flandre, Centre Hospitalier Et Universitaire, 59000, Lille, France
| | - Christine Decanter
- Service de Gynécologie Endocrinienne Et Médecine de La Reproduction, CHU Lille, Assistance Médicale À La Procréation Et Préservation de La Fertilité, Hôpital Jeanne de Flandre, Service dAvenue Eugène Avinée, 59000, Lille, France
- EA 4308 Gamètogenèse Et Qualité du Gamète, Faculté de Médecine Et CHU de Lille, F-59000, Lille, France
| | - Hélène Behal
- EA 2694, Santé Publique : Épidémiologie Et Qualité Des Soins, Univ. Lille, CHU Lille, Unité de Biostatistiques, F-59000, Lille, France
| | - Pierre Collinet
- Service de Chirurgie Gynécologique, Hôpital Jeanne de Flandre, Centre Hospitalier Et Universitaire, 59000, Lille, France
- Faculté de Médecine, Université de Lille, 59045, Lille, France
| | - Chrystèle Rubod
- Service de Chirurgie Gynécologique, Hôpital Jeanne de Flandre, Centre Hospitalier Et Universitaire, 59000, Lille, France
- Faculté de Médecine, Université de Lille, 59045, Lille, France
| | - Anne-Laure Barbotin
- Institut de Biologie de La Reproduction-Spermiologie-CECOS, Hôpital Jeanne de Flandre, Centre Hospitalier Et Universitaire, 59000, Lille, France
- EA 4308 Gamètogenèse Et Qualité du Gamète, Faculté de Médecine Et CHU de Lille, F-59000, Lille, France
- Faculté de Médecine, Université de Lille, 59045, Lille, France
| | - Geoffroy Robin
- Service de Gynécologie Endocrinienne Et Médecine de La Reproduction, CHU Lille, Assistance Médicale À La Procréation Et Préservation de La Fertilité, Hôpital Jeanne de Flandre, Service dAvenue Eugène Avinée, 59000, Lille, France
- EA 4308 Gamètogenèse Et Qualité du Gamète, Faculté de Médecine Et CHU de Lille, F-59000, Lille, France
- Faculté de Médecine, Université de Lille, 59045, Lille, France
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Karibayeva G, Tevkin S, Jussubaliyeva T, Shishimorova M. DYSMORPHISMS OF OOCYTES IN ART PROCEDURES. LITERATURE REVIEW. REPRODUCTIVE MEDICINE 2021. [DOI: 10.37800/rm2021-1-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Currentliterature review presents the analysis of results of studies of morphological qualities and anomalies (dysmorphisms) of human oocytes in the field of assisted reproductive technologies. The variety of intracytoplasmic anomalies encountered in the clinical practice of in vitro fertilization, their effect on fertilization, cleavage, implantation frequency, clinical pregnancy rate were described. Moreover, the morphological characteristics of oocyte could be considered to use as biomarkers in predicting the quality of embryos and blastocysts, and further implantation potential.
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16
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Wuri L, Agca C, Agca Y. Morphometric, subcellular, in vitro fertilisation and embryonic developmental assessment of mouse oocytes produced by anti-inhibin serum or pregnant mare serum gonadotrophin superovulation. Reprod Fertil Dev 2021; 32:474-483. [PMID: 31972126 DOI: 10.1071/rd19131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 08/01/2019] [Indexed: 11/23/2022] Open
Abstract
This study compared the morphometric, subcellular characteristics, in vitro fertilisation (IVF) and embryonic developmental potential of metaphase II (MII) mouse oocytes obtained from females superovulated with either anti-inhibin serum-human chorionic gonadotrophin (AIS-hCG) or pregnant mare serum gonadotrophin (PMSG)-hCG. The oocyte's quantity, quality, zona pellucida (ZP) thickness, perivitelline space (PVS), diameter, microtubules, F-actin, cortical granules (CGs) and mitochondrial distribution were determined. Superovulation using AIS-hCG resulted in a higher numbers of oocyte/donor compared with PMSG-hCG (P=0.002). There was no difference in morphologically normal and abnormal oocytes between AIS-hCG and PMSG-hCG (P=0.425 and P=0.194, respectively). The morphometric measurements showed no difference in oocyte diameter between AIS-hCG and PMSG-hCG (P=0.289). However, the thickness of the ZP of oocytes from AIS-hCG females was decreased compared with PMSG-hCG (P<0.001). The PVS of oocytes from the AIS-hCG was larger than with PMSG-hCG (P<0.001). The microtubules of oocytes from both AIS-hCG and PMSG-hCG were normal, although there was an increased fluorescence intensity in the AIS-hCG oocytes (P<0.001). The F-actin and CGs distribution in oocytes from both AIS-hCG and PMSG-hCG were similar (P=0.330 and P=0.13, respectively). Although the oocytes from PMSG-hCG females had homogenously distributed mitochondria, AIS-hCG oocytes showed more peripheral distribution with no differences in fluorescence intensity (P=0.137). The blastocyst development rates after IVF with fresh sperm showed no difference between AIS-hCG and PMSG-hCG (P=0.235). These data suggested that AIS-hCG superovulation produces high numbers of morphologically normal oocytes that also possess normal subcellular structures, good morphological characteristics and had high invitro embryonic developmental potential.
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Affiliation(s)
- Liga Wuri
- Division of Animal Sciences, University of Missouri, 920 East Campus Drive, Columbia, MO 65201, USA
| | - Cansu Agca
- College of Veterinary Medicine, University of Missouri, 1600 East Rollins Street, Columbia, MO 65211, USA
| | - Yuksel Agca
- Division of Animal Sciences, University of Missouri, 920 East Campus Drive, Columbia, MO 65201, USA; and College of Veterinary Medicine, University of Missouri, 1600 East Rollins Street, Columbia, MO 65211, USA; and Corresponding author.
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17
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Evaluating the value of day 0 of an ICSI cycle on indicating laboratory outcome. Sci Rep 2020; 10:19325. [PMID: 33168856 PMCID: PMC7653966 DOI: 10.1038/s41598-020-75164-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 10/07/2020] [Indexed: 01/12/2023] Open
Abstract
A number of oocyte characteristics have been associated with fertilization, implantation and live-birth rates, albeit without reaching a consensus. This study aims to delineate possible associations between oocyte characteristics, oocyte behavior during intracytoplasmic sperm injection (ICSI), fertilization potential, and laboratory outcomes. Four-hundred and seventy-seven patients, yielding 3452 oocytes, were enrolled in this prospective observational study from 2015 to 2018. Οoplasm granularity was associated with poor embryo quality and higher probabilities of post-ICSI oocytes and embryos discarded in any developmental stage and never selected for embryo transfer or cryopreservation (p < 0.001). Both sudden or difficult ooplasm aspiration, and high or lack of resistance during ICSI were associated with either a poor Zygote-Score or fertilization failure (p < 0.001). Sudden or difficult ooplasm aspiration and high resistance during ICSI penetration were positively associated with resulting to a post-ICSI oocyte or embryo that would be selected for discard. Evaluation of oocyte characteristics and oocyte behavior during ICSI may provide early information regarding laboratory and cycle outcomes. Particularly, ooplasm granularity, and fragmentation of polar body, along with sudden or difficult ooplasm aspiration and high or lack of resistance during ICSI penetration may hinder the outcome of an ICSI cycle. The associations presented herein may contribute towards development of a grading system or a prediction model. Taking into account information on oocytes and ICSI behavior may effectively assist in enhancing IVF outcome rates.
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18
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Pan C, Zhang H. Embryological Characteristics and Clinical Outcomes of Oocytes with Heterogeneous Zona Pellucida During Assisted Reproduction Treatment: A Retrospective Study. Med Sci Monit 2020; 26:e924316. [PMID: 33090975 PMCID: PMC7590521 DOI: 10.12659/msm.924316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background The condition of the zona pellucida can be used to predict human oocyte quality. This study investigated the embryological characteristics and clinical outcomes of oocytes with heterogeneous zona pellucida (HZP) during in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). Material/Methods This was a retrospective study of IVF and ICSI cycles undertaken at The First Affiliated Hospital of Wenzhou Medical University between June 2006 and March 2016. Cycles involving oocytes with HZP (HZP group) were compared with those involving non-HZP oocytes retrieved on the same day (non-HZP group). Embryological characteristics and clinical outcomes were compared. Results There were 29 IVF and 46 ICSI cycles in the HZP group, and 521 IVF and 206 ICSI cycles in the non-HZP group. In ICSI cycles, the rates of MII oocyte and high-quality embryo were lower in the HZP group (p<0.05 vs. non-HZP). In IVF cycles, the MII oocyte (p<0.001), normal fertilization (p<0.001), and cleavage (p<0.001) rates were lower, while the abandoned transfer rate (p<0.001) was higher in the HZP group compared with the non-HZP group. The positive human chorionic gonadotropin (HCG), implantation, pregnancy, and miscarriage rates were similar between groups. Multivariate analysis revealed that the woman’s age (OR=0.916 95% CI 0.873–0.962; p<0.001) and the number of D3 high-quality embryos (OR=1.120 95% CI 1.004–1.249; p=0.043) were associated with pregnancy in IVF cycles, but no significant factors were found in ICSI cycles. Conclusions ICSI may help increase the number of viable embryos in cycles with oocytes showing HZP. However, both IVF and ICSI cycles can achieve pregnancy.
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Affiliation(s)
- Chengshuang Pan
- Reproductive Medicine Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Huan Zhang
- Reproductive Medicine Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
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19
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Ozturk S. Selection of competent oocytes by morphological criteria for assisted reproductive technologies. Mol Reprod Dev 2020; 87:1021-1036. [PMID: 32902927 DOI: 10.1002/mrd.23420] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 07/17/2020] [Accepted: 08/22/2020] [Indexed: 02/06/2023]
Abstract
Invasive and noninvasive methods are commonly used to select developmentally competent oocytes that can improve the take-home baby rates in assisted reproductive technology (ART) centers. One of the noninvasive methods conventionally utilized to determine competent oocytes is the morphological analysis of cumulus complex, first polar body, zona pellucida, perivitelline space, meiotic spindle, and ooplasm. Successful fertilization, early embryo development, uterine implantation, and healthy pregnancy depend on the quality of oocytes, and morphological evaluation is one of the options used to predict quality levels. In this review, the morphological criteria being utilized in certain ART centers are comprehensively evaluated with special references to their predictive values and potential contributions to selecting high-quality oocytes.
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Affiliation(s)
- Saffet Ozturk
- Department of Histology and Embryology, Akdeniz University School of Medicine, Antalya, Turkey
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20
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Zanetti BF, Braga DPDAF, Setti AS, Iaconelli A, Borges E. Effect of GnRH analogues for pituitary suppression on oocyte morphology in repeated ovarian stimulation cycles. JBRA Assist Reprod 2020; 24:24-29. [PMID: 31436072 PMCID: PMC6993161 DOI: 10.5935/1518-0557.20190050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVE To compare the effect of pituitary suppression regimens on oocyte morphology in consecutive ICSI cycles of the same patients. METHODS Data was obtained from 200 matched consecutive intracytoplasmic sperm injection (ICSI) cycles performed in 100 couples undergoing the first cycle with the GnRH agonist and the following cycle with the GnRH antagonist regimen, from January 2010 to August 2016, in a private university-affiliated IVF centre. The effects of the pituitary suppression type on oocyte morphology were assessed by multivariate General Linear Models. RESULTS Mean interval between cycles was 185.32±192.85 days. Maternal age, body mass index, and total FSH dose administered were similar in both patients' cycles. Antagonist cycles presented lower incidence of dark cytoplasm (0.69±3.28% vs. 4.40±17.70%, p=0.047), Smooth endoplasmic reticulum (SER cluster (4.37±11.62% vs. 7.36±17.17%, p=0.046), and ZP defects (6.05±14.76% vs. 11.84±25.13%, p=0.049). Similar numbers of follicles retrieved oocytes, and mature oocytes were observed between the GnRH groups, as well as the fertilisation rate, number of obtained embryos, high-quality embryo rates, and the clinical outcomes. CONCLUSION GnRH antagonist's inhibitory effect on the ovaries in consecutive ICSI cycles results in improved oocyte maturity and morphology, despite similar laboratory and clinical outcomes, compared to the GnRH agonist treatment.
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Affiliation(s)
- Bianca Ferrarini Zanetti
- Fertility Medical Group, São Paulo, SP - Brazil.,Instituto Sapientiae - Centro de Estudos e Pesquisa em Reprodução Humana Assistida, São Paulo, SP - Brazil
| | - Daniela Paes de Almeida Ferreira Braga
- Fertility Medical Group, São Paulo, SP - Brazil.,Instituto Sapientiae - Centro de Estudos e Pesquisa em Reprodução Humana Assistida, São Paulo, SP - Brazil
| | - Amanda Souza Setti
- Fertility Medical Group, São Paulo, SP - Brazil.,Instituto Sapientiae - Centro de Estudos e Pesquisa em Reprodução Humana Assistida, São Paulo, SP - Brazil
| | - Assumpto Iaconelli
- Fertility Medical Group, São Paulo, SP - Brazil.,Instituto Sapientiae - Centro de Estudos e Pesquisa em Reprodução Humana Assistida, São Paulo, SP - Brazil
| | - Edson Borges
- Fertility Medical Group, São Paulo, SP - Brazil.,Instituto Sapientiae - Centro de Estudos e Pesquisa em Reprodução Humana Assistida, São Paulo, SP - Brazil
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21
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Ten J, Peinado P, Guerrero J, Bernabeu A, Llácer J, Orozco-Beltran D, Carratala-Munuera C, Bernabeu R. Comparison of the assisted reproductive technology outcomes between conventional IVF and ICSI with donor oocytes in normozoospermic patients. HUM FERTIL 2019; 25:56-62. [PMID: 31703537 DOI: 10.1080/14647273.2019.1686775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
There is no evidence for the superiority of conventional in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) using donor oocytes. This retrospective descriptive study aimed to compare the outcomes of conventional IVF (n = 506) and ICSI (n = 613) with donor oocytes in (n = 968) normozoospermic patients. Although the fertilization rate was statistically higher in the ICSI group (p < 0.001), conventional IVF provided better results than ICSI with respect to embryo quality (number of grade A embryos, p < 0.001). In addition, we observed more blastocysts in the conventional IVF group (p < 0.001) and more good quality embryos were obtained for cryopreservation compared to ICSI (p < 0.001). Regarding clinical results, there were no statistical significant differences in the positive pregnancy test, clinical pregnancy and clinical miscarriage rates between IVF and ICSI. However, the implantation rate was statistically higher when IVF was performed (50.4% vs. 43.0%, p = 0.031, OR (95% CI): 1.185 (1.050-2.530)). In conclusion, with the use of normozoospermic samples in our oocyte donation programme, IVF offers more embryo efficiency and increased implantation rates than ICSI.
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Affiliation(s)
| | | | | | | | | | - Domingo Orozco-Beltran
- Cátedra de Medicina Comunitaria y Salud Reproductiva, Miguel Hernandez University, Alicante, Spain
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22
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Using time-lapse technology to explore vacuolization in embryos on Day 3 and Day 4. Arch Gynecol Obstet 2018; 299:857-862. [PMID: 30569342 DOI: 10.1007/s00404-018-5008-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 12/07/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE To investigate the occurrence and development state of embryo vacuoles between the 8-cell and morula stages, and to explore how vacuoles affected the development of embryos. METHODS A retrospective study of a cohort of 422 patients undergoing conventional in vitro fertilization or intracytoplasmic sperm injection. With the help of time-lapse imaging, the development processes and outcomes of good quality embryos with or without vacuoles were analyzed. RESULTS Vacuole positive embryos had significantly lower blastulation rate and good quality blastulation rate than vacuole negative embryos, p < 0.05. Compared to vacuole negative embryos, the number of best and good quality blastocysts was significantly reduced, while the number of fair and discarded ones was significantly increased, p < 0.05. The average starting time of vacuolization was 73.7 ± 9.3 h after insemination. The proportion of blastomeres affected by vacuoles was associated with embryonic developmental potential. CONCLUSIONS Vacuolization on Day 3 and Day 4 was frequently observed and was detrimental to embryo development. The proportion of blastomeres affected by vacuoles may be an indicator of embryo developmental potential.
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23
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Fuentes R, Letelier J, Tajer B, Valdivia LE, Mullins MC. Fishing forward and reverse: Advances in zebrafish phenomics. Mech Dev 2018; 154:296-308. [PMID: 30130581 PMCID: PMC6289646 DOI: 10.1016/j.mod.2018.08.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 08/06/2018] [Accepted: 08/17/2018] [Indexed: 12/15/2022]
Abstract
Understanding how the genome instructs the phenotypic characteristics of an organism is one of the major scientific endeavors of our time. Advances in genetics have progressively deciphered the inheritance, identity and biological relevance of genetically encoded information, contributing to the rise of several, complementary omic disciplines. One of them is phenomics, an emergent area of biology dedicated to the systematic multi-scale analysis of phenotypic traits. This discipline provides valuable gene function information to the rapidly evolving field of genetics. Current molecular tools enable genome-wide analyses that link gene sequence to function in multi-cellular organisms, illuminating the genome-phenome relationship. Among vertebrates, zebrafish has emerged as an outstanding model organism for high-throughput phenotyping and modeling of human disorders. Advances in both systematic mutagenesis and phenotypic analyses of embryonic and post-embryonic stages in zebrafish have revealed the function of a valuable collection of genes and the general structure of several complex traits. In this review, we summarize multiple large-scale genetic efforts addressing parental, embryonic, and adult phenotyping in the zebrafish. The genetic and quantitative tools available in the zebrafish model, coupled with the broad spectrum of phenotypes that can be assayed, make it a powerful model for phenomics, well suited for the dissection of genotype-phenotype associations in development, physiology, health and disease.
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Affiliation(s)
- Ricardo Fuentes
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Joaquín Letelier
- Centro Andaluz de Biología del Desarrollo (CSIC/UPO/JA), Seville, Spain; Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Benjamin Tajer
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Leonardo E Valdivia
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile.
| | - Mary C Mullins
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Merviel P, Cabry R, Chardon K, Haraux E, Scheffler F, Mansouri NB, Devaux A, Chahine H, Bach V, Copin H, Benkhalifa M. Impact of oocytes with CLCG on ICSI outcomes and their potential relation to pesticide exposure. J Ovarian Res 2017; 10:42. [PMID: 28693528 PMCID: PMC5504732 DOI: 10.1186/s13048-017-0335-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 06/06/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Oocyte quality is a key limiting factor in female fertility which is primarily reflected in morphological features. Centrally located cytoplasm granulation (CLCG) is one type of cytoplasmic dimorphism exhibited by oocytes that could be linked to pesticide exposure with a significant risk of decreased ICSI outcomes. METHODS This retrospective study included 633 women who were part of an intracytoplasmic spermatozoa injection (ICSI) program between 2009 and 2011. The participants lived in the Picardy region of France and had been exposed to pesticides. The participants were divided in two groups based on prevalence of oocytes with CLCG (LCLCG [n = 83]: low prevalence of oocytes with CLCG under 25%. HCLCG [n = 68]: high prevalence of CLCG over 75%). The embryological and clinical outcomes were analysed for both groups and were calculated using the difference between the two values. RESULTS Results for couples with HCLCG compared to LCLCG showed a decrease in embryo cleavage, ongoing pregnancy, and live birth rates (82%, 14%, 13% vs 99%, 32%, 30%, respectively).The early miscarriage rate was increased (47% vs 11%), with an OR of 3.1 (95%CI [2.1-4.1]). Due to high pesticide exposure (over 3000 g/ha), there is a higher risk of a resulting disturbed oocyte cohort with a high prevalence of CLCG over 75%. CONCLUSION The high prevalence of oocytes with CLCG over 75% has a negative effect on embryos and the general ICSI clinical outcomes. Furthermore, a putative association between pesticide exposure and risk of CLCG was identified, justifying the need for further research and a potential need to find alternative assisted reproductive technologies for these couples. TRIAL REGISTRATION Tabacfertimasc. ID number: ID2011-A00634-37 ; registered 2011/2/8.
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Affiliation(s)
- Philippe Merviel
- Ob/Gyn Department, Regional University hospital, Morvan University, 29200, Brest, France
| | - Rosalie Cabry
- ART and Reproductive Biology laboratory, University hospital and school of medicine, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France.,PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Karen Chardon
- PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Elodie Haraux
- PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Florence Scheffler
- ART and Reproductive Biology laboratory, University hospital and school of medicine, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France.,PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Naima-Belhadri Mansouri
- ART and Reproductive Biology laboratory, University hospital and school of medicine, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Aviva Devaux
- ART and Reproductive Biology laboratory, University hospital and school of medicine, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France.,PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Hikmat Chahine
- Forte Bio et Unilabs France, 1 Rue Mozart, 92200, Clichy La Garenne, France
| | - Véronique Bach
- PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Henri Copin
- ART and Reproductive Biology laboratory, University hospital and school of medicine, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France
| | - Moncef Benkhalifa
- ART and Reproductive Biology laboratory, University hospital and school of medicine, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France. .,PERITOX-INERIS laboratory, CURS, Picardie University Jules Verne, CHU Sud, 80054, Amiens, France.
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Liu L, Cai J, Li P, Jiang X, Ren J. Clinical outcome of cycles with oocyte degeneration after intracytoplasmic sperm injection. Syst Biol Reprod Med 2017; 63:113-119. [PMID: 28151020 DOI: 10.1080/19396368.2016.1272648] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
There are variant rates of oocyte degeneration after intracytoplasmic sperm injection (ICSI) among different patients. Oocyte degeneration after ICSI may reflect the cohort of oocyte quality and subsequent embryo development capacity and clinical outcome. This retrospective study analyzed 255 cycles with at least one degenerated oocyte after ICSI (degeneration group) and 243 cycles with no degenerated oocytes after ICSI (control group). Basic characteristics like female age, body mass index, duration of infertility, hormone (FSH, LH, E2) levels on day 3 of menses, and primary infertility patient rate were similar between the two groups (p > 0.05). Total dose of gonadotropin and length of stimulation were also similar between the two groups (p > 0.05), but the degeneration group exhibited a more exuberant response to ovarian stimulation as reflected by more oocytes retrieved (p < 0.05). The number of 2PN embryos available and high quality embryos were similar between the two groups (p > 0.05), but the high quality embryo rate, early cleavage embryo rate, and available embryo rate were all statistically lower than the control group (p < 0.05). Embryo developmental kinetics seemed to be disturbed and embryo fragmentation rate increased in the degeneration group (p < 0.05). However, there was no statistical difference in the distribution of graded embryos transferred, and there were no statistical differences in the pregnancy rate, implantation rate, and abortion rate between the two groups (p > 0.05). We deduce that the presence of oocyte degeneration after ICSI may be associated with decreased embryo quality with embryo development kinetics disturbed. However, the clinical outcomes may not be affected if the premise that sufficient high quality degeneration group embryos are available for transfer.
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Affiliation(s)
- Lanlan Liu
- a Reproductive Medicine Center, Affiliated Chenggong Hospital of Xiamen University , Xiamen , Fujian , China.,b The 174th Hospital of PLA , Xiamen , Fujian , China
| | - Jiali Cai
- a Reproductive Medicine Center, Affiliated Chenggong Hospital of Xiamen University , Xiamen , Fujian , China.,b The 174th Hospital of PLA , Xiamen , Fujian , China
| | - Ping Li
- a Reproductive Medicine Center, Affiliated Chenggong Hospital of Xiamen University , Xiamen , Fujian , China.,b The 174th Hospital of PLA , Xiamen , Fujian , China
| | - Xiaoming Jiang
- a Reproductive Medicine Center, Affiliated Chenggong Hospital of Xiamen University , Xiamen , Fujian , China.,b The 174th Hospital of PLA , Xiamen , Fujian , China
| | - Jianzhi Ren
- a Reproductive Medicine Center, Affiliated Chenggong Hospital of Xiamen University , Xiamen , Fujian , China.,b The 174th Hospital of PLA , Xiamen , Fujian , China
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Yu EJ, Ahn H, Lee JM, Jee BC, Kim SH. Fertilization and embryo quality of mature oocytes with specific morphological abnormalities. Clin Exp Reprod Med 2015; 42:156-62. [PMID: 26815385 PMCID: PMC4724600 DOI: 10.5653/cerm.2015.42.4.156] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 09/08/2015] [Accepted: 10/07/2015] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE To investigate fertilization and embryo quality of dysmorphic mature oocytes with specific morphological abnormalities obtained from intracytoplasmic sperm injection (ICSI). METHODS The fertilization rate (FR) and embryo quality were compared among 58 dysmorphic and 42 normal form oocytes (control 1) obtained from 35 consecutive ICSI cycles, each of which yielded at least one dysmorphic mature oocyte, performed over a period of 5 years. The FR and embryo quality of 441 normal form oocytes from another 119 ICSI cycles that did not involve dysmorphic oocytes served as control 2. Dysmorphic oocytes were classified as having a dark cytoplasm, cytoplasmic granularity, cytoplasmic vacuoles, refractile bodies in the cytoplasm, smooth endoplasmic reticulum in the cytoplasm, an oval shape, an abnormal zona pellucida, a large perivitelline space, debris in the perivitelline space, or an abnormal polar body (PB). RESULTS The overall FR was significantly lower in dysmorphic oocytes than in normal form oocytes in both the control 1 and control 2 groups. However, embryo quality in the dysmorphic oocyte group and the normal form oocyte groups at day 3 was similar. The FR and embryo quality were similar in the oocyte groups with a single abnormality and multiple abnormalities. Specific abnormalities related with a higher percentage of top-quality embryos were dark cytoplasm (66.7%), abnormal PB (50%), and cytoplasmic vacuoles (25%). CONCLUSION The fertilization potential of dysmorphic oocytes in our study was lower, but their subsequent embryonic development and embryo quality was relatively good. We were able to define several specific abnormalities related with good or poor embryo quality.
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Affiliation(s)
- Eun Jeong Yu
- Department of Obstetrics and Gynecology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Hyojeong Ahn
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea
| | - Jang Mi Lee
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Byung Chul Jee
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.; Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Seok Hyun Kim
- Department of Obstetrics and Gynecology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.; Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea
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Ashrafi M, Karimian L, Eftekhari-Yazdi P, Hasani F, Arabipoor A, Bahmanabadi A, Akhond MR. Effect of oocyte dysmorphisms on intracytoplasmic sperm injection cycle outcomes in normal ovarian responders. J Obstet Gynaecol Res 2015; 41:1912-20. [PMID: 26419975 DOI: 10.1111/jog.12818] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 06/02/2015] [Accepted: 06/22/2015] [Indexed: 11/27/2022]
Abstract
AIM The aim of this study was to identify the influence of oocyte dysmorphisms on clinical outcomes after intracytoplasmic sperm injection cycle in normal responders. MATERIAL AND METHODS In the prospective study, morphology of 1999 metaphase II oocytes retrieved from 316 intracytoplasmic sperm injection cycles was evaluated from March 2011 to March 2013 at Royan Institute. Controlled ovarian stimulation was performed by long standard agonist protocol. Oocyte morphology was assessed before sperm injection by one embryologist. The associations between fertilization rate, embryo quality and the independent variables were analyzed using odds ratio (OR) calculated with unconditional logistic regression test. RESULTS From all retrieved oocytes, 1543 (77.1%) showed at least one morphologic aberration. Presence of cytoplasmic vacuoles and high cytoplasmic viscosity were associated with a significant decrease in the fertilization rate (OR: 0.5; P = 0.004 and OR: 0.6; P = 0.03, respectively). The results showed that oocyte morphology did not affect embryo quality. The number of gonadotrophin injections used showed a direct relation with presence of large perivitelline space. No significant difference was observed among four groups (women with total normal morphologic oocytes [group 1], women with total extracytoplasmic dysmorphic oocytes [group 2], women with total cytoplasmic dysmorphic oocytes [group 3] and women with total oocytes containing multiple dysmorphic features [group 4]) in terms of implantation and clinical pregnancy rates. CONCLUSIONS Metaphase II oocyte morphology had minor impacts on fertilization rate, pronuclear morphology and embryo quality in women with normal ovarian response.
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Affiliation(s)
- Mahnaz Ashrafi
- Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.,Obstetrics and Gynecology Department, Faculty of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Leila Karimian
- Department of Embryology at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Poopak Eftekhari-Yazdi
- Department of Embryology at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Fatemeh Hasani
- Department of Embryology at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Arezoo Arabipoor
- Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Akram Bahmanabadi
- Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mohammad Reza Akhond
- Department of Epidemiology and Reproductive Health at Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
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Sauerbrun-Cutler MT, Vega M, Breborowicz A, Gonzales E, Stein D, Lederman M, Keltz M. Oocyte zona pellucida dysmorphology is associated with diminished in-vitro fertilization success. J Ovarian Res 2015; 8:5. [PMID: 25823613 PMCID: PMC4355133 DOI: 10.1186/s13048-014-0111-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 11/25/2014] [Indexed: 12/31/2022] Open
Abstract
Background Although irregularities in human zona pellucida (ZP) morphology are well described, there is scant literature on the clinical significance of ZP dysmorphology. We, therefore, designed a retrospective cohort trial of ZP dysmorphology to assess the clinical significance of ZP dysmorphology and its affect on IVF outcome. Over the same time period a random sample of 77 cycles of 77 subjects with all normal oocyte morphology were selected as controls. Methods Between July 2006 and December 2010, all fresh non-donor cases performed at a university hospital IVF center were assessed for ZP dysmorphology. ZP dysmorphology included extracytoplasmic abnormalities (dark ZP and large perivitelline space) and oocyte shape (oval or irregularly shaped ZP). 136 IVF cycles from 119 subjects were identified where a majority of oocytes displayed ZP dysmorphology. Over the same time period a random sample of 77 cycles of 77 subjects with all normal oocyte morphology were selected as controls. IVF prognostic and outcome parameters were compared between the patients with dysmorphic and normal oocytes. Results 136/1710 (8.0%) cycles of fresh non-donor IVF displayed predominant ZP dysmorphology. Dysmorphic and normal oocytes showed no difference in the oocyte quality predictors such as FSH (6.03+/−2.5 vs. 6.8+/−2.3 IU/L), or AMH (2.5+/−2.0 vs. 2.30+/−1.5 ng/ml levels). ZP dysmorphology was associated with markedly diminished clinical pregnancy rates (44% vs. 70%; RR:0.62 [0.48, 0.80]; p = 0.0002), implantation rates (.17 vs. .36; IRR: 0.48 [0.34, 0.68]; p < 0.0001) and live birth rates as compared to non dysmorphic oocytes (29% vs. 52%; RR:0.55 [0.39, 0.79]; p = 0.001). Conclusions ZP dysmorphology is associated with markedly diminished pregnancy and implantation rates in IVF. The poorer outcome appears to be independent of the usual markers of ovarian reserve.
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Microfluidic method of pig oocyte quality assessment in relation to different follicular size based on lab-on-chip technology. BIOMED RESEARCH INTERNATIONAL 2014; 2014:467063. [PMID: 25548771 PMCID: PMC4274715 DOI: 10.1155/2014/467063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 05/12/2014] [Indexed: 11/17/2022]
Abstract
Since microfollicular environment and the size of the follicle are important markers influencing oocyte quality, the aim of this study is to present the spectral characterization of oocytes isolated from follicles of various sizes using lab-on-chip (LOC) technology and to demonstrate how follicle size may affect oocyte quality. Porcine oocytes (each, n = 100) recovered from follicles of different sizes, for example, from large (>5 mm), medium (3–5 mm), and small (<3 mm), were analyzed after preceding in vitro maturation (IVM). The LOC analysis was performed using a silicon-glass sandwich with two glass optical fibers positioned “face-to-face.” Oocytes collected from follicles of different size classes revealed specific and distinguishable spectral characteristics. The absorbance spectra (microspectrometric specificity) for oocytes isolated from large, medium, and small follicles differ significantly (P < 0.05) and the absorbance wavelengths were between 626 and 628 nm, between 618 and 620 nm, and less than 618 nm, respectively. The present study offers a parametric and objective method of porcine oocyte assessment. However, up to now this study has been used to evidence spectral markers associated with follicular size in pigs, only. Further investigations with functional-biological assays and comparing LOC analyses with fertilization and pregnancy success and the outcome of healthy offspring must be performed.
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Zhou HX, Ma YZ, Liu YL, Chen Y, Zhou CJ, Wu SN, Shen JP, Liang CG. Assessment of mouse germinal vesicle stage oocyte quality by evaluating the cumulus layer, zona pellucida, and perivitelline space. PLoS One 2014; 9:e105812. [PMID: 25144310 PMCID: PMC4140848 DOI: 10.1371/journal.pone.0105812] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 07/23/2014] [Indexed: 12/14/2022] Open
Abstract
To improve the outcome of assisted reproductive technology (ART) for patients with ovulation problems, it is necessary to retrieve and select germinal vesicle (GV) stage oocytes with high developmental potential. Oocytes with high developmental potential are characterized by their ability to undergo proper maturation, fertilization, and embryo development. In this study, we analyzed morphological traits of GV stage mouse oocytes, including cumulus cell layer thickness, zona pellucida thickness, and perivitelline space width. Then, we assessed the corresponding developmental potential of each of these oocytes and found that it varies across the range measured for each morphological trait. Furthermore, by manipulating these morphological traits invitro, we were able to determine the influence of morphological variation on oocyte developmental potential. Manually altering the thickness of the cumulus layer showed strong effects on the fertilization and embryo development potentials of oocytes, whereas manipulation of zona pellucida thickness effected the oocyte maturation potential. Our results provide a systematic detailed method for selecting GV stage oocytes based on a morphological assessment approach that would benefit for several downstream ART applications.
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Affiliation(s)
- Hong-Xia Zhou
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Yu-Zhen Ma
- Inner Mongolia People’s Hospital, Hohhot, Inner Mongolia, People’s Republic of China
| | - Ying-Lei Liu
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Ying Chen
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Cheng-Jie Zhou
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Sha-Na Wu
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Jiang-Peng Shen
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Cheng-Guang Liang
- The Key Laboratory of National Education Ministry for Mammalian Reproductive Biology and Biotechnology, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
- * E-mail:
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First polar body morphology affects potential development of porcine parthenogenetic embryo in vitro. ZYGOTE 2014; 23:615-21. [PMID: 24990597 DOI: 10.1017/s0967199414000252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Previous studies have reported that the first polar body (PB1) morphology reflects embryo development competence, but the effects of PB1 on porcine embryo development remain unknown. This study aims to determine whether the ability of porcine embryo development is related to oocytes' PB1 in vitro. The distribution of type II cortical granules (CGs) of porcine matured oocytes in grade B PB1 is significantly greater compared with those in grades A and C PB1 (71.43% versus 52.46% and 50%; P 0.05). The acetylation level of porcine embryos in the group with grade B PB1 is significantly greater compared with those in the other groups (P < 0.05), and is almost 2.5 times higher than that in grade A. Therefore, porcine oocytes with PB1 in grade B are more competitive in cytoplasmic maturation and further embryo development in vitro.
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Oocytes with a dark zona pellucida demonstrate lower fertilization, implantation and clinical pregnancy rates in IVF/ICSI cycles. PLoS One 2014; 9:e89409. [PMID: 24586757 PMCID: PMC3933533 DOI: 10.1371/journal.pone.0089409] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Accepted: 01/21/2014] [Indexed: 11/19/2022] Open
Abstract
The morphological assessment of oocytes is important for embryologists to identify and select MII oocytes in IVF/ICSI cycles. Dysmorphism of oocytes decreases viability and the developmental potential of oocytes as well as the clinical pregnancy rate. Several reports have suggested that oocytes with a dark zona pellucida (DZP) correlate with the outcome of IVF treatment. However, the effect of DZP on oocyte quality, fertilization, implantation, and pregnancy outcome were not investigated in detail. In this study, a retrospective analysis was performed in 268 infertile patients with fallopian tube obstruction and/or male factor infertility. In 204 of these patients, all oocytes were surrounded by a normal zona pellucida (NZP, control group), whereas 46 patients were found to have part of their retrieved oocytes enclosed by NZP and the other by DZP (Group A). In addition, all oocytes enclosed by DZP were retrieved from 18 patients (Group B). No differences were detected between the control and group A. Compared to the control group, the rates of fertilization, good quality embryos, implantation and clinical pregnancy were significantly decreased in group B. Furthermore, mitochondria in oocytes with a DZP in both of the two study groups (A and B) were severely damaged with several ultrastructural alterations, which were associated with an increased density of the zona pellucida and vacuolization. Briefly, oocytes with a DZP affected the clinical outcome in IVF/ICSI cycles and appeared to contain more ultrastructural alterations. Thus, DZP could be used as a potential selective marker for embryologists during daily laboratory work.
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Pregnancy with oocytes characterized by narrow perivitelline space and heterogeneous zona pellucida: is intracytoplasmic sperm injection necessary? J Assist Reprod Genet 2014; 31:285-94. [PMID: 24408184 DOI: 10.1007/s10815-013-0169-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 12/26/2013] [Indexed: 12/17/2022] Open
Abstract
PURPOSE This retrospective study analyzed fertilization protocols and pregnancy outcomes for oocytes with with narrow perivitelline space and heterogeneous zona pellucid (NPVS/HZP). METHODS In 63 in-vitro fertilization cycles filled with NPVS/HZP oocytes (abnormal oocytes group) and 521 cycles with normal oocytes (normal oocytes group), major clinical and laboratory parameters were recorded and compared in different fertilization cycles (conventional IVF cycles, rescue ICSI cycles, and traditional ICSI cycles). RESULTS NPVS/HZP oocytes meant lower MIIoocytes rates in both IVF and ICSI cycles compared with normal oocytes (p < 0.05). The 2PN rates for abnormal oocytes were significantly lower than those for normal oocytes in both conventional IVF cycles (58.8% VS 71.3%, P < 0.05) and rescue ICSI cycles (58.0% VS 78.0%, P = 0.0000). The high-quality embryo rates in normal oocytes groups were significantly higher than those in abnormal oocytes groups in different fertilization cycles (52.2% VS 35.0%, P < 0.01; 42.9% VS 23.9%, P < 0.001; 50.6% VS 31.0%, P = 0.0000, respectively). No clinical pregnancy was obtained from abnormal oocytes in 11 conventional IVF cycles. The clinical pregnancy rates in rescue ICSI and traditional ICSI cycles were comparatively lower in abnormal oocytes groups, but there was no significant difference as compared with normal oocytes groups (35.0% VS 48.1% and 26.7% VS 50.7%, P > 0.05, respectively). CONCLUSIONS Retrieval of oocytes characterized by NPVS/PZP from cycle to cycle was one of the reasons for obscure infertility. ICSI may be the right way to avoid fertilization failure and get pregnancy in women with NPVS/HZP oocytes.
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Embryological, clinical and ultrastructural study of human oocytes presenting indented zona pellucida. ZYGOTE 2013; 23:145-57. [DOI: 10.1017/s0967199413000403] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryHuman oocyte dysmorphisms attain a large proportion of retrieved oocytes from assisted reproductive technology (ART) treatment cycles. Extracytoplasmic defects involve abnormal morphology of the zona pellucida (ZP), perivitelline space and first polar body. The aim of the present study was to describe a novel dysmorphism affecting the ZP, indented ZP. We also evaluated the clinical, embryological and ultrastructural features of these cases. We evaluated all ART treatment cycles during 7 consecutive years and found 13 treatment cycles (six patients) with all oocytes presenting an indented ZP. In addition, these oocytes presented total or partial absence of the perivitelline space, absence of resistance to ZP and oolemma penetration during microinjection, and low ooplasm viscosity during aspiration. This novel described dysmorphism was recurrent and attained all oocytes in three cases that had more than one treatment cycle. When compared with controls, data showed significant low oocyte maturity (42% versus 81.6%) and high cycle cancellation (30.8% versus 8.5%) rates, normal degeneration (3.4% versus 6.3%) and fertilization rates (69% versus 69.5%), and low pregnancy (15.4% versus 33.3%) and live-birth delivery (7.7% versus 27.7%) rates per cycle. Ultrastructure analysis revealed a zona pellucida structure with large empty electrolucent regions, an outer ZP layer with an indented surface with protuberances and a thick inner ZP that obliterated the perivitelline space. There was evidence of exocytosis of ZP material by the oocyte. In conclusion, oocytes with this novel described dysmorphism (indented ZP) are associated with low maturity, pregnancy and live-birth delivery rates.
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Influence of oocyte dysmorphisms on blastocyst formation and quality. Fertil Steril 2013; 100:748-54. [DOI: 10.1016/j.fertnstert.2013.05.021] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/09/2013] [Accepted: 05/15/2013] [Indexed: 11/23/2022]
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Lee J, You J, Lee GS, Hyun SH, Lee E. Pig oocytes with a large perivitelline space matured in vitro show greater developmental competence after parthenogenesis and somatic cell nuclear transfer. Mol Reprod Dev 2013; 80:753-62. [DOI: 10.1002/mrd.22205] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Accepted: 06/05/2013] [Indexed: 01/15/2023]
Affiliation(s)
- Joohyeong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
| | - Jinyoung You
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine; Chungbuk National University; Cheongju Korea
| | - Eunsong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
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Cota AMM, Oliveira JBA, Petersen CG, Mauri AL, Massaro FC, Silva LFI, Nicoletti A, Cavagna M, Baruffi RLR, Franco JG. GnRH agonist versus GnRH antagonist in assisted reproduction cycles: oocyte morphology. Reprod Biol Endocrinol 2012; 10:33. [PMID: 22540993 PMCID: PMC3464873 DOI: 10.1186/1477-7827-10-33] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 04/27/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The selection of developmentally competent human gametes may increase the efficiency of assisted reproduction. Spermatozoa and oocytes are usually assessed according to morphological criteria. Oocyte morphology can be affected by the age, genetic characteristics, and factors related to controlled ovarian stimulation. However, there is a lack of evidence in the literature concerning the effect of gonadotropin-releasing hormone (GnRH) analogues, either agonists or antagonists, on oocyte morphology. The aim of this randomized study was to investigate whether the prevalence of oocyte dysmorphism is influenced by the type of pituitary suppression used in ovarian stimulation. METHODS A total of 64 patients in the first intracytoplasmic sperm injection (ICSI) cycle were prospectively randomized to receive treatment with either a GnRH agonist with a long-term protocol (n: 32) or a GnRH antagonist with a multi-dose protocol (n: 32). Before being subjected to ICSI, the oocytes at metaphase II from both groups were morphologically analyzed under an inverted light microscope at 400x magnification. The oocytes were classified as follows: normal or with cytoplasmic dysmorphism, extracytoplasmic dysmorphism, or both. The number of dysmorphic oocytes per total number of oocytes was analyzed. RESULTS Out of a total of 681 oocytes, 189 (27.8%) were morphologically normal, 220 (32.3%) showed cytoplasmic dysmorphism, 124 (18.2%) showed extracytoplasmic alterations, and 148 (21.7%) exhibited both types of dysmorphism. No significant difference in oocyte dysmorphism was observed between the agonist- and antagonist-treated groups (P>0.05). Analysis for each dysmorphism revealed that the most common conditions were alterations in polar body shape (31.3%) and the presence of diffuse cytoplasmic granulations (22.8%), refractile bodies (18.5%) and central cytoplasmic granulations (13.6%). There was no significant difference among individual oocyte dysmorphisms in the agonist- and antagonist-treated groups (P>0.05). CONCLUSIONS Our randomized data indicate that in terms of the quality of oocyte morphology, there is no difference between the antagonist multi-dose protocol and the long-term agonist protocol. If a GnRH analogue used for pituitary suppression in IVF cycles influences the prevalence of oocyte dysmorphisms, there does not appear to be a difference between the use of an agonist as opposed to an antagonist.
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Affiliation(s)
- Ana Marcia M Cota
- Department of Gynecology and Obstetrics, Botucatu Medical School, São Paulo State University—UNESP, Botucatu, Brazil
| | - Joao Batista A Oliveira
- Department of Gynecology and Obstetrics, Botucatu Medical School, São Paulo State University—UNESP, Botucatu, Brazil
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
| | - Claudia G Petersen
- Department of Gynecology and Obstetrics, Botucatu Medical School, São Paulo State University—UNESP, Botucatu, Brazil
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
| | - Ana L Mauri
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
| | - Fabiana C Massaro
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
| | - Liliane FI Silva
- Department of Gynecology and Obstetrics, Botucatu Medical School, São Paulo State University—UNESP, Botucatu, Brazil
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
| | - Andreia Nicoletti
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
| | - Mario Cavagna
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
- Women’s Health Reference Center, Perola Byington Hospital, Sao Paulo, Brazil
| | - Ricardo LR Baruffi
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
| | - José G Franco
- Department of Gynecology and Obstetrics, Botucatu Medical School, São Paulo State University—UNESP, Botucatu, Brazil
- Center for Human Reproduction Prof. Franco Junior, Ribeirao Preto, Brazil
- Paulista Center for Diagnosis, Research and Training, Ribeirao Preto, Brazil
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Setti AS, Figueira RCS, Braga DPAF, Colturato SS, Iaconelli A, Borges E. Relationship between oocyte abnormal morphology and intracytoplasmic sperm injection outcomes: a meta-analysis. Eur J Obstet Gynecol Reprod Biol 2011; 159:364-70. [PMID: 21824710 DOI: 10.1016/j.ejogrb.2011.07.031] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 07/12/2011] [Accepted: 07/14/2011] [Indexed: 12/26/2022]
Abstract
The aim of this study was to perform a meta-analysis of the potential effects of oocyte morphological abnormalities on ICSI outcomes. Relevant original papers reporting on the relation between oocyte morphology and ICSI outcomes were identified by searching MEDLINE, EMBASE and the Cochrane Library. The main outcome measures were fertilisation rate and embryo quality. A meta-analysis was performed and Mantel-Haenszel pooled odd ratios (ORs) with 95% confidence intervals (CIs) were calculated to express the relation between the oocyte morphology and the ICSI outcomes. A total of 14 studies reporting 3688 ICSI cycles were included. Our meta-analysis demonstrates that the probability of an oocyte becoming fertilised is significantly reduced by the presence of large IPB (OR: 0.29, CI: 0.09-0.90), large PVS (OR: 0.86, CI: 0.74-0.99), refractile bodies (OR: 0.66, CI: 0.51-0.84) or vacuoles (OR: 0.59, CI: 0.42-0.83). No other investigated morphological abnormalities demonstrated significant relationships with ICSI outcomes. Our data demonstrate that the presence of large IPB, large PVS, refractile bodies or vacuoles is associated with decreased oocyte fertilisation. Our findings might be of importance for selecting embryos for replacement because the effects of oocyte abnormalities on implantation and pregnancy rates remain unclear.
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Affiliation(s)
- Amanda S Setti
- Sapientiae Institute - Educational and Research Center in Assisted Reproduction, Rua Vieira Maciel, 62, São Paulo, SP, Zip 04503-040, Brazil
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Montag M, Köster M, van der Ven K, van der Ven H. Gamete competence assessment by polarizing optics in assisted reproduction. Hum Reprod Update 2011; 17:654-66. [DOI: 10.1093/humupd/dmr016] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Rienzi L, Vajta G, Ubaldi F. Predictive value of oocyte morphology in human IVF: a systematic review of the literature. Hum Reprod Update 2010; 17:34-45. [PMID: 20639518 PMCID: PMC3001337 DOI: 10.1093/humupd/dmq029] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Non-invasive selection of developmentally competent human oocytes may increase the overall efficiency of human assisted reproduction and is regarded as crucial in countries where legal, social or religious factors restrict the production of supernumerary embryos. The purpose of this study was to summarize the predictive value for IVF success of morphological features of the oocyte that can be obtained by light or polarized microscopic investigations. METHODS Studies about oocyte morphology and IVF/ICSI outcomes were identified by using a systematic literature search. RESULTS Fifty relevant articles were identified: 33 analysed a single feature, 9 observed multiple features and investigated the effect of these features individually, 8 summarized the effect of individual features. Investigated structures were the following: meiotic spindle (15 papers), zona pellucida (15 papers), vacuoles or refractile bodies (14 papers), polar body shape (12 papers), oocyte shape (10 papers), dark cytoplasm or diffuse granulation (12 papers), perivitelline space (11 papers), central cytoplasmic granulation (8 papers), cumulus–oocyte complex (6 papers) and cytoplasm viscosity and membrane resistance characteristics (2 papers). None of these features were unanimously evaluated to have prognostic value for further developmental competence of oocytes. CONCLUSIONS No clear tendency in recent publications to a general increase in predictive value of morphological features was found. These contradicting data underline the importance of more intensive and coordinated research to reach a consensus and fully exploit the predictive potential of morphological examination of human oocytes.
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Affiliation(s)
- Laura Rienzi
- G.EN.E.R.A Centre for Reproductive Medicine, Clinica Valle Giulia, Via G. De Notaris 2, 00197 Rome, Italy.
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RETRACTED: Failed fertilization after clinical intracytoplasmic sperm injection. Reprod Biomed Online 2010; 20:56-67. [DOI: 10.1016/j.rbmo.2009.10.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Revised: 05/06/2009] [Accepted: 09/10/2009] [Indexed: 11/24/2022]
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Montag M, Schimming T, Köster M, Zhou C, Dorn C, Rösing B, van der Ven H, Ven der Ven K. Oocyte zona birefringence intensity is associated with embryonic implantation potential in ICSI cycles. Reprod Biomed Online 2008; 16:239-44. [PMID: 18284880 DOI: 10.1016/s1472-6483(10)60580-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A retrospective study recently showed that oocytes presenting with a high birefringence of the inner zona layer were more often associated with conception cycles. To further investigate these findings, a prospective study was conducted between September 2005 and September 2006 including intracytoplasmic sperm injection (ICSI) cycles presenting with at least two embryos for transfer. Using a polarization imaging system, oocytes were classified prior to ICSI treatment as having either a high zona birefringence (HZB) or a low zona birefringence (LZB) of the zona pellucida. Using zona birefringence as the only selection criterion, two fertilized oocytes, preferably derived from HZB oocytes, were selected for further culture and transfer. The required criteria were met by 135 ICSI cycles (124 patients; 34.9 +/- 4.1 years of age). Embryos for transfer were used in 20 cycles derived from HZB/HZB oocytes, in 50 cycles from HZB/LZB oocytes and in 65 from LZB/LZB oocytes. The corresponding implantation (P < 0.025), pregnancy (P < 0.005) and live birth (P < 0.025) rates were significantly different between HZB/HZB and HZB/LZB versus LZB/LZB group. Embryo development was superior in embryos derived from HZB oocytes. This study concludes that oocyte zona birefringence is a good selection criterion and a good predictive criterion for embryo implantation potential.
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Affiliation(s)
- M Montag
- Department of Gynecological Endocrinology and Reproductive Medicine, University of Bonn, Sigmund-Freud-Str. 25, D-53127 Bonn, Germany.
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Rienzi L, Ubaldi FM, Iacobelli M, Minasi MG, Romano S, Ferrero S, Sapienza F, Baroni E, Litwicka K, Greco E. Significance of metaphase II human oocyte morphology on ICSI outcome. Fertil Steril 2008; 90:1692-700. [PMID: 18249393 DOI: 10.1016/j.fertnstert.2007.09.024] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Revised: 09/11/2007] [Accepted: 09/11/2007] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the influence of specific oocyte morphologic features (morphotypes) on intracytoplasmic sperm injection (ICSI) outcome. The identification of oocyte quality markers is particularly important when a low number of oocytes can be used for IVF. DESIGN Retrospective analysis. SETTING Medical center. PATIENT(S) Five hundred sixteen consecutive ICSI cycles. Only couples affected by severe male factor infertility were excluded. INTERVENTION(S) A total of 1,191 metaphase II (MII) oocytes (1-3 per patient) were randomly selected from the cohort of oocytes obtained from each patient and evaluated for morphologic appearance. MAIN OUTCOME MEASURE(S) Fertilization, pronuclear morphology, embryo quality, pregnancy rate. RESULT(S) There was a presence of vacuoles, abnormal I polar body, and large perivitelline space related to a lower fertilization rate. Pronuclear morphology was effected by the presence of a large perivitelline space, diffused cytoplasmic granularity, and/or centrally located granular area. The latter characteristic also negatively related to day 2 embryo quality. According to the odds ratios obtained for each oocyte morphotype to reach at least one outcome, an MII oocyte morphologic score (MOMS) was calculated. A significant relationship was found between MOMS and female age, female basal FSH, and clinical outcome. CONCLUSION(S) Morphologic evaluation before ICSI helps to identify MII oocytes with higher developmental potential.
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Affiliation(s)
- Laura Rienzi
- Reproductive Medicine, European Hospital, Rome, Italy.
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