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Wilding MG, Capobianco C, Montanaro N, Kabili G, Di Matteo L, Fusco E, Dale B. Human cleavage-stage embryo vitrification is comparable to slow-rate cryopreservation in cycles of assisted reproduction. J Assist Reprod Genet 2010; 27:549-54. [PMID: 20640501 DOI: 10.1007/s10815-010-9452-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Accepted: 06/23/2010] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES To compare embryo survival, pregnancy and implantation rates after cryopreservation of human cleavage-stage embryos with slow-rate cryopreservation or vitrification. STUDY DESIGN 262 patients, attending for assisted reproduction, were prepared for oocyte retrieval using standard controlled ovarian hyperstimulation protocols. Excess embryos were cryopreserved on day 3 either by vitrification, or slow-rate cryopreservation in a programmable freezer. Cycles of thawing were monitored for thaw efficiency, pregnancy and implantation rates. RESULTS Clinical pregnancy and implantation rates were highly comparable between cycles in which day 3 embryos were thawed either after slow-rate cryopreservation or vitrification. CONCLUSIONS These data suggest that vitrification of human embryos during assisted reproduction cycles achieves comparable success rates to fresh cycles and therefore can be applied in the laboratory of assisted reproduction.
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Kaku M, Kamada H, Kawata T, Koseki H, Abedini S, Kojima S, Motokawa M, Fujita T, Ohtani J, Tsuka N, Matsuda Y, Sunagawa H, Hernandes RAM, Ohwada N, Tanne K. Cryopreservation of periodontal ligament cells with magnetic field for tooth banking. Cryobiology 2010; 61:73-8. [PMID: 20478291 DOI: 10.1016/j.cryobiol.2010.05.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Revised: 05/10/2010] [Accepted: 05/10/2010] [Indexed: 10/19/2022]
Abstract
The purpose of this study was to establish a long-term tooth cryopreservation method that can be used for tooth autotransplantation. Human periodontal ligament (PDL) cells were frozen in 10% dimethyl sulfoxide (Me(2)SO) using a programmed freezer with a magnetic field. Cells were cryopreserved for 7 days at -150 degrees C. Immediately after thawing, the number of surviving cells was counted and the cells were cultured; cultured cells were examined after 48 h. Results indicated that a 0.01 mT of a magnetic field, a 15-min hold-time, and a plunging temperature of -30 degrees C led to the greatest survival rate of PDL cells. Based on these findings, whole teeth were cryopreserved under the same conditions for 1 year. The organ culture revealed that the PDL cells of cryopreserved tooth with a magnetic field could proliferate as much as a fresh tooth, although the cells did not appear in the cryopreserved tooth without a magnetic field. Histological examination and the transmission electron microscopic image of cryopreserved tooth with a magnetic field did not show any destruction of cryopreserved cells. In contrast, severe cell damage was seen in cells frozen without a magnetic field. These results indicated that a magnetic field programmed freezer is available for tooth cryopreservation.
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Affiliation(s)
- M Kaku
- Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Science, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
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Preservación de la fertilidad en la mujer. REVISTA MÉDICA CLÍNICA LAS CONDES 2010. [DOI: 10.1016/s0716-8640(10)70556-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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54
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Elnahas A, Alcolak E, Marar EA, Elnahas T, Elnahas K, Palapelas V, Diedrich K, Al-Hasani S. Vitrification of human oocytes and different development stages of embryos: An overview. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2010. [DOI: 10.1016/j.mefs.2010.03.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Zhang J, Cui J, Ling X, Li X, Peng Y, Guo X, Heng BC, Tong GQ. Vitrification of mouse embryos at 2-cell, 4-cell and 8-cell stages by cryotop method. J Assist Reprod Genet 2009; 26:621-8. [PMID: 19967554 DOI: 10.1007/s10815-009-9370-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Accepted: 11/13/2009] [Indexed: 12/01/2022] Open
Abstract
PURPOSE The objective of this study was to investigate the effects of vitrification on the preimplantation developmental competence of mouse 2-cell, 4-cell and 8-cell stage embryos. METHODS Mouse 2-cell, 4-cell and 8-cell stage embryos were cryopreserved using the cryotop vitrification method and subsequently warmed on a later date. The embryos were then assessed by their morphology, blastocyst formation and hatching rates. Additionally, trophectoderm (TE) and inner cell mass (ICM) cell numbers were compared in hatched blastocysts from the control and experimental groups. RESULTS Vitrified embryos at the 2-cell, 4-cell and 8-cell stages appeared morphologically normal after warming. The overall survival rate of vitrified embryos at various stages after warming was 96.7% and there were no significant differences among 2-cell stage (96.0%), 4-cell stage (96.8%) and 8-cell stage (97.1%) embryos (P > 0.05). The blastocyst formation rate (69.4%) and hatching rate (52.6%) of vitrified 2-cell embryos were significantly lower than that from the control group and vitrified 8-cell embryos (P < 0.05). In the vitrified 4-cell embryo group, the blastocyst formation rate (90.3%) was similar to the 8-cell group (91.2%), but the hatching rate (60.0%) was significantly lower than that of the non-vitrified control ( 84.1%) and vitrified 8-cell embryo (78.4%) groups (P < 0.05). When further development to the fully hatched blastocyst stage was compared, hatched blastocysts derived from vitrified 2-cell, 4-cell and 8-cell embryos had significantly lower cell counts both in the ICM and TE, as compared to fresh blastocysts (P < 0.05). Among the vitrified 2-cell, 4-cell and 8-cell embryo groups, there were no significant differences in the cell counts of ICM and TE (P > 0.05). CONCLUSIONS Although cryotop vitrification was suitable for the cryopreservation of mouse embryos from the 2-cell stage, 4-cell stage and 8-cell stage without significant loss of survival, vitrification had an adverse effect on the development of 2-cell embryos. Mouse embryos at the 8-cell stage had the best tolerance for vitrification and would yield the highest level of post-vitrification developmental competence among early cleavage stage embryos. Nevertheless, it is unclear how these findings can be extrapolated to human embryos.
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Affiliation(s)
- Junqiang Zhang
- Department of Reproduction, Nanjing Maternity and Child Health Hospital, Nanjing Medical University, Nanjing 210004, People's Republic of China
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AbdelHafez FF, Desai N, Abou-Setta AM, Falcone T, Goldfarb J. Slow freezing, vitrification and ultra-rapid freezing of human embryos: a systematic review and meta-analysis. Reprod Biomed Online 2009; 20:209-22. [PMID: 20113959 DOI: 10.1016/j.rbmo.2009.11.013] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 04/16/2009] [Accepted: 09/21/2009] [Indexed: 11/26/2022]
Abstract
Embryo cryopreservation is an important aspect of assisted reproduction. Many methods have been described, but they have been poorly investigated in randomized trials, highlighting the need for a systematic review of the literature. Meticulous electronic/hand searches were performed to locate randomized trials (RCT) comparing embryo cryopreservation methods. Primary outcomes were clinical pregnancy rate (CPR) and incidence of congenital abnormalities. Secondary outcomes included live-birth (LBR), ongoing pregnancy (OPR), implantation (IR), and miscarriage (MR) rates. Data were extracted to allow for an intention-to-treat analysis and analysed using a random-effects model. Literature search revealed 11 RCT, of which five were excluded. The quality of the included studies was variable, but generally poor. There was a significantly higher CPR, OPR and IR with vitrification compared with slow freezing (odds ratio (OR)=1.55, 95% confidence interval (CI)=1.03-2.32, OR=1.82, 95% CI=1.04-3.20 and OR=1.49, 95% CI=1.03-2.15, respectively). In addition, there was a significantly lower CPR and OPR with embryo ultra-rapid freezing compared with slow freezing (OR=0.35, 95% CI=0.16-0.76 and OR=0.37, 95% CI=0.17-0.81, respectively). Vitrification is superior to slow freezing, which in turn is superior to ultra-rapid freezing. However, more well-designed and powered studies are needed to further corroborate these findings.
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Affiliation(s)
- Faten F AbdelHafez
- Department of Obstetrics and Gynecology, Cleveland Clinic Foundation, Cleveland, OH, USA
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Abstract
The success of reproductive technologies is facilitated by the cryopreservation of embryos and gametes. In Italy, where legislation prohibits zygote and embryo cryopreservation, clinics have extensively introduced oocyte cryopreservation. Two different strategies of oocyte cryopreservation are available: slow freezing or ultrarapid cooling (vitrification). Although the results are very encouraging with both methods, there is still controversy regarding both the procedure itself and the most suitable method to use. This study reports the routine application of the two different oocyte cryopreservation methods in programmes running in two consecutive periods. The study centre carried out 286 thawing cycles for a total of 1348 thawed oocytes cryopreserved by the slow-freezing method and 59 warming cycles for a total of 285 warmed oocytes cryopreserved by vitrification. Comparison of the outcomes obtained with the slow-freezing method versus vitrification in women who underwent IVF for infertility showed survival, fertilization, pregnancy and implantation rates of 57.9% versus 78.9% (P < 0.0001), 64.6% versus 72.8% (P = 0.027), 7.6% versus 18.2% (P = 0.021) and 4.3% versus 9.3% (P = 0.043) respectively. These results suggest that oocyte vitrification is associated with a better outcome than the slow-freezing method.
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58
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Zhang X, Trokoudes KM, Pavlides C. Vitrification of biopsied embryos at cleavage, morula and blastocyst stage. Reprod Biomed Online 2009; 19:526-31. [DOI: 10.1016/j.rbmo.2009.05.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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59
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Learning curve of vitrification assessed by cumulative summation test for learning curve (LC-CUSUM). Fertil Steril 2009; 92:943-945. [DOI: 10.1016/j.fertnstert.2009.01.133] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 01/21/2009] [Accepted: 01/23/2009] [Indexed: 11/19/2022]
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Rezazadeh Valojerdi M, Eftekhari-Yazdi P, Karimian L, Hassani F, Movaghar B. Vitrification versus slow freezing gives excellent survival, post warming embryo morphology and pregnancy outcomes for human cleaved embryos. J Assist Reprod Genet 2009; 26:347-54. [PMID: 19513822 DOI: 10.1007/s10815-009-9318-6] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Accepted: 05/18/2009] [Indexed: 11/29/2022] Open
Abstract
PURPOSE The objective of this retrospective study was to evaluate the efficacy of vitrification and slow freezing for the cryopreservation of human cleavage stage embryos in terms of post-warming survival rate, post-warming embryo morphology and clinical outcomes. METHODS The embryos of 305 patients at cleavage stages were cryopreserved either with vitrification (153 patients) or slow-freezing (152 patients) methods. After warming; the survival rate, post-warmed embryo morphology, clinical pregnancy and implantation rates were evaluated and compared between the two groups. RESULT(S) In the vitrification group versus slow freezing group, the survival rate (96.9% vs. 82.8%) and the post-warmed excellent morphology with all blastomeres intact (91.8% vs. 56.2%) were higher with an odds ratio of 6.607 (95% confidence interval; 4.184-10.434) and 8.769 (95% confidence interval; 6.460-11.904), respectively. In this group, the clinical pregnancy rate (40.5% vs. 21.4%) and the implantation rate (16.6% vs. 6.8%) were also higher with an odds ratio of 2.427 (95%confidence interval; 1.461-4.033) and 2.726 (95% confidence interval; 1.837-4.046), respectively. CONCLUSION(S) Vitrification in contrast to slow freezing is an efficient method for cryopreservation of human cleavage stage embryos. Vitrification provides a higher survival rate, minimal deleterious effects on post-warming embryo morphology and it can improve clinical outcomes.
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Affiliation(s)
- Mojtaba Rezazadeh Valojerdi
- Embryology Department, Reproductive Medicine Research Center, Royan Institute, ACECR, 19395-4644, Tehran, Iran.
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Kader A, Agarwal A, Abdelrazik H, Sharma RK, Ahmady A, Falcone T. Evaluation of post-thaw DNA integrity of mouse blastocysts after ultrarapid and slow freezing. Fertil Steril 2009; 91:2087-94. [DOI: 10.1016/j.fertnstert.2008.04.049] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 04/22/2008] [Accepted: 04/22/2008] [Indexed: 11/30/2022]
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Boyer P, Gervoise-Boyer M, Tourame P, Poirot C, Le Coz P. Information sur une nouvelle technique : la vitrification des ovocytes. BULLETIN DE L'ACADÉMIE NATIONALE DE MÉDECINE 2009. [DOI: 10.1016/s0001-4079(19)32501-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Oocyte vitrification—Women's emancipation set in stone. Fertil Steril 2009; 91:1319-20. [DOI: 10.1016/j.fertnstert.2008.02.127] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Revised: 02/14/2008] [Accepted: 02/14/2008] [Indexed: 11/18/2022]
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Varghese AC, Peter Nagy Z, Agarwal A. Current trends, biological foundations and future prospects of oocyte and embryo cryopreservation. Reprod Biomed Online 2009. [DOI: 10.1016/s1472-6483(10)60181-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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65
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Macas E, Mátyás G, Reuge P, Berger W, Imthurn B. Polar body biopsy for Curschmann–Steinert disease and successful pregnancy following embryo vitrification. Reprod Biomed Online 2009; 18:815-20. [DOI: 10.1016/s1472-6483(10)60031-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Current trends, biological foundations and future prospects of oocyte and embryo cryopreservation. Reprod Biomed Online 2009; 19:126-40. [DOI: 10.1016/s1472-6483(10)60056-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ozmen B, Schöpper B, Schultz-Mosgau A, Youssry M, Diedrich K, Al-Hasani S. A live birth after transfer of a day 2 embryo derived from frozen-thawed zygotes that had undergone polar body biopsy: a case report. Fertil Steril 2008; 90:1201.e9-11. [PMID: 18166177 DOI: 10.1016/j.fertnstert.2007.09.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 09/18/2007] [Accepted: 09/18/2007] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To present a live birth after freezing and thawing of biopsied oocytes. DESIGN Case report. SETTING Artificial reproduction unit of a university hospital. PATIENT(S) A primary infertile couple with asthenoteratozoospermia and repeated failures of intracytoplasmic sperm injection (ICSI). INTERVENTION(S) Screening of aneuploidy during the fourth ICSI cycle with polar body biopsy (PB) for repeated failures of artificial reproductive techniques and a transfer of a cryopreserved day 2 embryo derived from cryopreserved zygotes with slow-rate freezing after PB. MAIN OUTCOMES MEASURE(S) Live birth, viability, and survival. RESULT(S) A successful pregnancy and a live birth were presented after a transfer of day 2 embryos derived from oocytes that underwent PB and subsequent cryopreservation. CONCLUSION(S) Pregnancy can be obtained subsequent to cryopreservation and thawing after PB.
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Affiliation(s)
- Batuhan Ozmen
- Department of Gynecology and Obstetrics, University of Schleswig-Holstein, Lübeck Campus, Lübeck, Germany
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High survival and developmental rates of vitrified mouse zygotes following polar body biopsy. Reprod Biomed Online 2008; 16:271-5. [DOI: 10.1016/s1472-6483(10)60585-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pregnancy after vitrification of pronuclear stage oocytes biopsied for polar body aneuploidy screening. Reprod Biomed Online 2008; 16:268-70. [DOI: 10.1016/s1472-6483(10)60584-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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