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Yang J, Wang Y, Li C, Han W, Liu W, Xiong S, Zhang Q, Tong K, Huang G, Zhang X. Variation of Female Pronucleus Reveals Oocyte or Embryo Chromosomal Copy Number Variations. ADVANCED GENETICS (HOBOKEN, N.J.) 2023; 4:2200001. [PMID: 36910589 PMCID: PMC10000260 DOI: 10.1002/ggn2.202200001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 09/20/2022] [Indexed: 11/11/2022]
Abstract
The characteristics of the human pronuclei (PNs), which exist 16-22 h after fertilization, appear to serve as good indicators to evaluate the quality of human oocyte and embryo, and may reflect the status of female and male chromosome composition. Here, a quantitative PN measurement method that is generated by applying expert experience combined with deep learning from large annotated datasets is reported. After mathematic reconstruction of PNs, significant differences are obtained in chromosome-normal rate and chromosomal small errors such as copy number variants by comparing the size of the reconstructive female PN. After integrating the whole procedure of PN dynamics and adjusting for errors that occur during PN identification, the results are robust. Notably, all positive prediction results are obtained from the female propositus population. Thus, the size of female PNs may mirror the internal quality of the chromosomal integrity of the oocyte. Embryos that develop from zygotes with larger female PNs may have a reduced risk of copy number variations.
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Affiliation(s)
- Jingwei Yang
- Center for Reproductive Medicine Women and Children's Hospital of Chongqing Medical University Chongqing Health Center for Women and Children Chongqing 400010 China.,Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China
| | - Yikang Wang
- Department of Mechatronics Graduate School of Medicine, Engineering, and Agricultural Sciences University of Yamanashi Yamanashi-ken 400-8510 Japan
| | - Chong Li
- Center for Reproductive Medicine Women and Children's Hospital of Chongqing Medical University Chongqing Health Center for Women and Children Chongqing 400010 China.,Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China
| | - Wei Han
- Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China.,Chongqing Clinical Research Center for Reprodutive Medicine Chongqing 400010 China
| | - Weiwei Liu
- Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China.,Chongqing Clinical Research Center for Reprodutive Medicine Chongqing 400010 China
| | - Shun Xiong
- Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China.,Chongqing Clinical Research Center for Reprodutive Medicine Chongqing 400010 China
| | - Qi Zhang
- Center for Reproductive Medicine Women and Children's Hospital of Chongqing Medical University Chongqing Health Center for Women and Children Chongqing 400010 China.,Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China
| | - Keya Tong
- Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China.,Chongqing Clinical Research Center for Reprodutive Medicine Chongqing 400010 China
| | - Guoning Huang
- Center for Reproductive Medicine Women and Children's Hospital of Chongqing Medical University Chongqing Health Center for Women and Children Chongqing 400010 China.,Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China.,Chongqing Clinical Research Center for Reprodutive Medicine Chongqing 400010 China
| | - Xiaodong Zhang
- Center for Reproductive Medicine Women and Children's Hospital of Chongqing Medical University Chongqing Health Center for Women and Children Chongqing 400010 China.,Chongqing Key Laboratory of Human embryo Engineering Chongqing 400010 China.,Chongqing Clinical Research Center for Reprodutive Medicine Chongqing 400010 China
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Xu M, Wu W, Zhao M, Chung JPW, Li TC, Chan DYL. Common dysmorphic oocytes and embryos in assisted reproductive technology laboratory in association with gene alternations. Int J Biochem Cell Biol 2022; 152:106298. [PMID: 36122887 DOI: 10.1016/j.biocel.2022.106298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/29/2022]
Abstract
Amorphic or defected oocytes and embryos are commonly observed in assisted reproductive technology (ART) laboratories. It is believed that a proper gene expression at each stage of embryo development contributes to the possibility of a decent-quality embryo leading to successful implantation. Many studies reported that several defects in embryo morphology are associated with gene expressions during in vitro fertilization (IVF) treatment. There is lacking literature review on summarizing common morphological defects about gene alternations. In this review, we summarized the current literature. We selected 64 genes that have been reported to be involved in embryo morphological abnormalities in animals and humans, 30 of which were identified in humans and might be the causes of embryonic changes. Five papers focusing on associations of multiple gene expressions and embryo abnormalities using RNA transcriptomes were also included during the search. We have also reviewed our time-lapse image database with over 3000 oocytes/embryos to show morphological defects possibly related to gene alternations reported previously in the literature. This holistic review can better understand the associations between gene alternations and morphological changes. It is also beneficial to select important biomarkers with strong evidence in IVF practice and reveal their potential application in embryo selection. Also, identifying genes may help patients with genetic disorders avoid unnecessary treatments by providing preimplantation genetic testing for monogenic/single gene defects (PGT-M), reduce embryo replacements by less potential, and help scientists develop new methods for oocyte/embryo research in the near future.
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Affiliation(s)
- Murong Xu
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Waner Wu
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Mingpeng Zhao
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; Department of Reproductive Medicine, Department of Obstetrics and Gynaecology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jacqueline Pui Wah Chung
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Tin Chiu Li
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - David Yiu Leung Chan
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
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Faramarzi A, Khalili MA, Omidi M, Agha-Rahimi A, Taheri F. Pronuclear pattern does not predict morphokinetics behavior in human embryos. Gynecol Endocrinol 2018; 34:248-251. [PMID: 29034763 DOI: 10.1080/09513590.2017.1388365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The purpose was to investigate the correlation between pronuclei (PN) morphology and morphokinetic behaviors of derived embryos with time lapse monitoring (TLM) in assisted reproduction setting. Over time, PN morphology from PN appearance (PNA) to PN fading (PNF), PNF according to size, contact, number and position of nuclear precursor bodies (NPBs) within each PN and morphokinetics variables, including absolute time points, relative timing parameters, cleavage patterns and arrest rate, were evaluated using TLM. There were insignificant relationship between morphokinetics variables including tBP2, tPNA, tPNF, t2, t3, t4, t5, t6, t7, t8, S1, CC2, S2 and Z scoring according Z1 to Z4 (p > .05). Also, an insignificant relationship was noticed between uneven blastomeres, reverse cleavage embryos and Z scoring (p > .05). However, there were significant correlations between the rates of direct and arbitrary cleavage as well as arrested embryos and Z scores. Combined PN morphology and embryo kinetic evaluation were suggested in assisted reproduction programs.
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Affiliation(s)
- Azita Faramarzi
- a Research and Clinical Center for Infertility , Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences , Yazd , Iran
- b Department of Anatomical Sciences and Biology, Faculty of Medicine , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Mohammad Ali Khalili
- a Research and Clinical Center for Infertility , Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences , Yazd , Iran
| | - Marjan Omidi
- a Research and Clinical Center for Infertility , Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences , Yazd , Iran
| | - Azam Agha-Rahimi
- a Research and Clinical Center for Infertility , Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences , Yazd , Iran
| | - Fatemeh Taheri
- a Research and Clinical Center for Infertility , Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences , Yazd , Iran
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Hossain A, Phelps J, Agarwal A, Sanz E, Mahadevan M. A Review of The Society for Assisted Reproductive Technology Embryo Grading System and Proposed Modification. INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2016; 10:141-7. [PMID: 27441045 PMCID: PMC4948064 DOI: 10.22074/ijfs.2016.4956] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 08/30/2015] [Indexed: 01/17/2023]
Abstract
The Society for Assisted Reproductive Technology (SART) method of embryo grad- ing is unique, simple, and widely practiced, and its use has been mandatory for SART membership programs since 2010. Developed by SART in 2006, the current embryo grading system categories, "good, fair, and poor," are limited because they do not describe the best 1-2 embryos in the interest of keeping pace with the shift in clinical practice to be more selective and to transfer fewer embryos. This inspired us to conduct a review on the SART embryo grading system. In this retrospective study, the literature on evaluation of human embryo quality in gen- eral, and the SART method of evaluation in particular, were reviewed for the period of 2000 to 2014. A multifaceted search pertaining to methods of embryo grading and trans- fer using a combination of relevant terms [embryo, mammalian, embryo transfer, grade, grading, morphology, biomarkers, SART, and in vitro fertilization (IVF)] was performed. The inclusion and exclusion in this review were dictated by the aim and scope of the study. Two investigators independently assessed the studies and extracted information. A total of 61 articles were reviewed. Very few studies have evaluated the efficacy of the SART embryo grading method. The present study suggests the necessity for revision of the current SART grading system. The system, as it is now, lacks criteria for describing the cohort specific best embryo and thus is of limited use in single embryo transfer. The study foresees heightened descriptive efficiency of the SART system by implementing the proposed changes. Strengths and weaknesses of the SART embryo grading were identified. Ideas for selecting the best cohort-specific embryo have been discussed, which may trigger methodological improvement in SART and other embryo grading systems.
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Affiliation(s)
- Amjad Hossain
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology,
The University of Texas Medical Branch at Galveston, Galveston, Texas, USA
| | - John Phelps
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology,
The University of Texas Medical Branch at Galveston, Galveston, Texas, USA
| | - Ashok Agarwal
- Department of Urology, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - Eduardo Sanz
- Center for Reproductive Health, Crest Hill, IL, USA
| | - Maha Mahadevan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology,
University of Arkansas for Medical Sciences, Little Rock, AR, USA
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Fan Y, Zhao HC, Liu J, Tan T, Ding T, Li R, Zhao Y, Yan J, Sun X, Yu Y, Qiao J. Aberrant expression of maternal Plk1 and Dctn3 results in the developmental failure of human in-vivo- and in-vitro-matured oocytes. Sci Rep 2015; 5:8192. [PMID: 25645239 PMCID: PMC4314639 DOI: 10.1038/srep08192] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 01/12/2015] [Indexed: 12/31/2022] Open
Abstract
Fertilisation is the first step in embryonic development, and dynamic changes of key genes may potentially improve assisted reproduction techniques efficiency during this process. Here, we analysed genes that were differentially expressed between oocytes and zygotes and focused on cytokinesis-related genes. Plk1 and Dctn3 were identified as showing dramatic changes in expression during fertilisation and were suggested to play a key role in inducing aneuploidy in zygotes and 8-cell embryos. Moreover, we found that maternal Plk1 and Dctn3 were expressed at lower levels in in vitro matured oocytes, which may have contributed to the high ratio of resulting embryos with abnormal Plk1 and Dctn3 expression levels, thereby reducing the developmental competence of the resulting embryos. Furthermore, the overexpression of Dctn3 can silence Plk1 expression, which suggests a potential regulation mechanism. In conclusion, our present study showed that aberrant expression of Plk1 and Dctn3 increases embryo aneuploidy and developmental failure, particularly in in vitro matured oocytes. Our results facilitate a better understanding of the effects of oocyte maternal gene expression on embryonic development and can be used to improve the outcome of assisted reproduction techniques.
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Affiliation(s)
- Yong Fan
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Hong-Cui Zhao
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
| | - Jianqiao Liu
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Tao Tan
- Yunnan Key Laboratory of Primate Biomedical Research and Kunming Biomed International and National Engineering Research Center of Biomedicine and Animal Science, Kunming, 650500, China
| | - Ting Ding
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
| | - Rong Li
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
| | - Yue Zhao
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
| | - Jie Yan
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
| | - Xiaofang Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Yang Yu
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
| | - Jie Qiao
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
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Aguilar J, Motato Y, Escribá MJ, Ojeda M, Muñoz E, Meseguer M. The human first cell cycle: impact on implantation. Reprod Biomed Online 2014; 28:475-84. [DOI: 10.1016/j.rbmo.2013.11.014] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 11/08/2013] [Accepted: 11/13/2013] [Indexed: 11/25/2022]
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Nicoli A, Palomba S, Capodanno F, Fini M, Falbo A, La Sala GB. Pronuclear morphology evaluation for fresh in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) cycles: a systematic review. J Ovarian Res 2013; 6:64. [PMID: 24028277 PMCID: PMC3847610 DOI: 10.1186/1757-2215-6-64] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 08/16/2013] [Indexed: 02/02/2023] Open
Abstract
The current systematic review was aimed to assess the effectiveness of the zygote morphology evaluation in fresh in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) cycles. All available studies reporting on zygote morphology and clinical and/or biological outcomes were analyzed. Forty studies were included in the final analysis. Fourteen different zygote scoring systems were employed. Zygote morphology correlated significantly with embryo quality and cleavage, blastocyst stage, embryonic chromosome status, in a high proportion of the studies which assessed the specific outcome [15/25 (60%), 15/20 (75%), 7/8 (87.5%), 6/6 (100%), respectively]. On the other hand, only a reduced proportion of papers showed a statistically significant relationship between implantation, pregnancy and delivery/live-birth rates and zygote morphology score [12/23 (52.2%), 12/25 (48%), 1/4 (25%), respectively]. In conclusion, our findings demonstrate the lack of conclusive data on the clinical efficacy of the zygote morphology evaluation in fresh IVF/ICSI cycles, even if biological results showing a good relationship with embryo viability suggest a role in cycles in which the transfer/freezing is performed at day 1.
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Affiliation(s)
- Alessia Nicoli
- Department of Obstetrics, Gynecology and Pediatrics, A,O, Arcispedale S, Maria Nuova, IRCCS, University of Modena and Reggio Emilia, Viale Risorgimento 80, 42123 Reggio Emilia, Italy.
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Pronuclear morphology evaluation in in vitro fertilization (IVF) / intracytoplasmic sperm injection (ICSI) cycles: a retrospective clinical review. J Ovarian Res 2013; 6:1. [PMID: 23282023 PMCID: PMC3544622 DOI: 10.1186/1757-2215-6-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 12/15/2012] [Indexed: 11/10/2022] Open
Abstract
UNLABELLED BACKGROUND The assessment of the embryo quality is crucial to maintain an high pregnancy rate and to reduce the risk of multiple pregnancy. The evaluation of the pronuclear and nucleolar characteristics of human zygote have been proposed as an indicator of embryo development and chromosomal complement. The aim of the current study was to assess the role of pronuclear morphology evaluation in vitro fertilization (IVF) / intracytoplasmic sperm injection (ICSI) cycles. METHODS Retrospective clinical analysis on 755 non-elective transfers of only one embryo (ET). Embryo assessment was performed in days 1 and 2. Clinical and biological data were recorded and analyzed according to embryo and/or pronuclear morphology. RESULTS Both pronuclear and embryo morphology were significantly related to clinical pregnancy and live-birth rates. No significant difference in clinical pregnancy and live-birth rates was detected when the pronuclear and embryo morphology assessments were combined. Embryo morphology and maternal age were the only independent predictors of favorable outcome by logistic regression analysis. CONCLUSIONS Pronuclear evaluation is effective to select the best zygotes if ET is performed at day 1, whereas it did not improve the clinical outcomes when combined with embryo morphology evaluation in day 2.
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Current World Literature. Curr Opin Obstet Gynecol 2012; 24:265-72. [DOI: 10.1097/gco.0b013e3283564f02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Prados FJ, Debrock S, Lemmen JG, Agerholm I. The cleavage stage embryo. Hum Reprod 2012; 27 Suppl 1:i50-71. [PMID: 22752610 DOI: 10.1093/humrep/des224] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Fernando J Prados
- Unidad de Reproducción, Hospital Universitario Madrid-Montepríncipe, Avenida Montepríncipe, 25, 28660 Boadilla del Monte, Spain.
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Azzarello A, Hoest T, Mikkelsen AL. The impact of pronuclei morphology and dynamicity on live birth outcome after time-lapse culture. Hum Reprod 2012; 27:2649-57. [DOI: 10.1093/humrep/des210] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Abstract
SummaryPurpose: To compare the effects of four culture media on the quality of human zygotes and embryos. Methods: Prospective study analyzing 2289 human embryos cultivated simultaneously in two different culture media: HTF, the default medium, with either Universal IVF, Global or IVF-30 as the secondary media. The sibling oocytes by each patient were randomly divided between the two culture media following intracytoplasmic sperm injection (ICSI). On day 1 the pronuclear stage of zygotes were evaluated and on day 2 embryos were evaluated according to the number of cells, percentage of fragmentation and number of nuclei. Z-test and odds ratios were used in the statistical analysis. Results: There was a higher percentage (55.2%) of class A1 + A2 zygotes with IVF-30 compared with HTF, Global or Universal IVF media (49.1%, 44.7% and 44.2%, respectively). The percentage of Top embryos was significantly higher with Global (40.2%) compared with HTF (21.3%), IVF-30 (25.0%) or Universal IVF media (11.2%). Conclusions: Global medium produced more Top embryos evaluated on day 2 of development.
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