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Leukemia inhibitory factor's effect on the growth and survival of sheep's follicles of ovarian tissue during vitrification. Cell Tissue Bank 2023; 24:109-123. [PMID: 35780438 DOI: 10.1007/s10561-022-10018-4] [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: 03/02/2022] [Accepted: 06/02/2022] [Indexed: 11/02/2022]
Abstract
One of the experimental programs for fertility protection in women includes protective cryopreservation. Vitroficasion of ovarian tissue is one of the protective cryopreservation methods that use high concentrations of antifreeze and faster cooling. To reduce its complications, LIF (Leukemia inhibitory factor) was used as a pretreatment in this study. In this study, the ovaries were randomly divided into 8 groups. In NCN (without pretreatment and LIF in culture media), NCP (without pretreatment and with LIF in culture media), PCP (with pretreatment and LIF in culture media), and PCN (with pretreatment and without LIF in culture media) groups, vitrification and reversal were not performed. In the groups NVN (without pretreatment and LIF in culture media), NVP (without pretreatment and with LIF in culture media) PV, PVP (with pretreatment and LIF in culture media), and PVN (with pretreatment and without LIF in culture medium) groups, vitrification and tissue reversal were performed. All groups were cultured and histological, cellular, and molecular evaluations were performed. The results of the present study showed that LIF in the culture medium reduced the number of abnormal, primordial, primary, and secondary follicles, and DNA breakage compared to the group without LIF (P < 0.05) and increases the growth of follicles and expression of GDF9, BMP, AMH, KITLG genes (P < 0.05). The use of LIF pretreatment before vitrification and melting of sheep ovary tissue in its culture medium reduces the damage caused by it and increases the growth and development of ovarian follicles while maintaining their function.
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Animal board invited review: Germplasm technologies for use with poultry. Animal 2022; 16:100475. [PMID: 35220173 DOI: 10.1016/j.animal.2022.100475] [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: 08/17/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 12/15/2022] Open
Abstract
Over the last century, several reproductive biotechnologies beyond the artificial incubation of eggs were developed to improve poultry breeding stocks and conserve their genetic diversity. These include artificial insemination (AI), semen storage, diploid primordial germ cell (PGC) methodologies, and gonad tissue storage and transplantation. Currently, AI is widely used for selection purposes in the poultry industry, in the breeding of turkeys and guinea fowl, and to solve fertility problems in duck interspecies crosses for the production of mule ducklings. The decline in some wild game species has also raised interest in reproductive technologies as a means of increasing the production of fertile eggs, and ultimately the number of birds that can be raised. AI requires viable sperm to be preserved in vitro for either short (fresh) or longer periods (chilling or freezing). Since spermatozoa are the most easily accessed sex cells, they are the cell type most commonly preserved by genetic resource banks. However, the cryopreservation of sperm only preserves half of the genome, and it cannot preserve the W chromosome. For avian species, the problem of preserving oocytes and zygotes may be solved via the cryopreservation and transplantation of PGCs and gonad tissue. The present review describes all these procedures and discusses how combining these different technologies allows poultry populations to be conserved and even rapidly reconstituted.
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Transcriptional downregulation of ABC transporters is related to follicular degeneration after vitrification and in vitro culture of ovine ovarian tissue. Theriogenology 2022; 177:127-132. [PMID: 34700069 DOI: 10.1016/j.theriogenology.2021.10.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 08/22/2021] [Accepted: 10/16/2021] [Indexed: 12/19/2022]
Abstract
ATP-binding cassette (ABC) transporters perform multiple functions in reproductive tissues. During ovarian tissue vitrification, the plasma membrane has important functions in the influx or efflux of water, and substances such as cryoprotectants and channel proteins that are required in this process. Thus, the present study aimed to verify the relative abundance of mRNA transcript of ABC transporters ABCB1, ABCG2, and MRP2 after vitrification and in vitro culture (IVC) of ovine ovarian tissue. For this study, the ovarian cortex fragments were proportioned into four groups as fresh control, vitrified control, fresh culture, and vitrified culture groups. After vitrification and in vitro culture, the ovarian tissue was evaluated using morphological procedures. Further, relative abundance of ABCB1, ABCG2, and MRP2 transporter mRNA transcripts in the ovarian cortex subjected to aforementioned treatment conditions were evaluated using qPCR. Our results showed a negative association between degenerated follicles and mRNA transcript abundances of ABCB1 and ABCG2. In addition, the percentage of growing follicles in the ovine ovarian cortex after vitrification was similar to that of the fresh control tissue without in vitro culture. The in vitro culture of fresh and vitrified tissue however, showed a significant decrease in the percentage of growing follicles. To the best of our knowledge, we believe that our data for the first time has studied the relative abundances of ABCB1 and ABCG2 mRNA transcripts in the ovine ovarian cortex. In addition, alterations of these protein channels may be indicative of a deleterious effect of osmotic stress on follicular survival during vitrification. Furthermore, these effects were detectable only after the IVC of the ovarian tissues. Nonetheless, further studies are required to investigate the functions of ABC transporters in ovine folliculogenesis, especially after in vitro culture of ovarian tissue.
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Silva LM, Mbemya GT, Guerreiro DD, Brito DCC, Donfack NJ, Morais MLG, Rodrigues GQ, Bruno JB, Rocha RMP, Alves BG, Apgar GA, Cibin FWS, Figueiredo JR, Rodrigues APR. Effect of Catalase or Alpha Lipoic Acid Supplementation in the Vitrification Solution of Ovine Ovarian Tissue. Biopreserv Biobank 2018; 16:258-269. [DOI: 10.1089/bio.2017.0122] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Luciana M. Silva
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | - Gildas T. Mbemya
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | | | | | | | | | | | - Jamily B. Bruno
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | | | - Benner G. Alves
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | - Gary A. Apgar
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
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Sampaio da Silva AM, Bruno JB, de Lima LF, Ribeiro de Sá NA, Lunardi FO, Ferreira ACA, Vieira Correia HH, de Aguiar FLN, Araújo VR, Lobo CH, de Alencar Araripe Moura A, Campello CC, Smitz J, de Figueiredo JR, Ribeiro Rodrigues AP. Connexin 37 and 43 gene and protein expression and developmental competence of isolated ovine secondary follicles cultured in vitro after vitrification of ovarian tissue. Theriogenology 2016; 85:1457-67. [PMID: 26876055 DOI: 10.1016/j.theriogenology.2016.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 12/01/2015] [Accepted: 01/04/2016] [Indexed: 12/25/2022]
Abstract
Cryoinjuries caused by vitrification of tissues and organs lead to the loss of membrane proteins that mediate intercellular communications, such as connexins 37 (Cx37) and 43 (Cx43). Thus, the present study aimed to evaluate ovine Cx37 and Cx43 gene and protein expressions and developmental competence by in vitro-cultured secondary follicles retrieved from vitrified ovarian tissue. Ovarian fragments for the same ovary pair were distributed into six treatments: (1) fresh ovarian tissue (FOT); (2) vitrified ovarian tissue (VOT); (3) isolated follicles from fresh ovarian tissue (FIF); (4) isolated follicles from vitrified ovarian tissue; (5) isolated follicles from fresh ovarian tissue followed by in vitro culture (CFIF); (6) isolated follicles from vitrified ovarian tissue followed by in vitro culture (CVIF). In all treatments, Cx37 and Cx43 gene and protein expression patterns were evaluated by reverse transcription polymerase chain reaction and immunocytochemistry. In addition, secondary follicles were analyzed according to follicular integrity and growth, apoptosis, and cell proliferation. In vitro-cultured secondary follicles (CFIF and CVIF) were evaluated based on morphology (extruded follicles), antrum formation, and viability. The percentage of intact follicles was higher, whereas antrum formation, oocyte extrusion rate, and follicle viability were lower in CVIF than in CFIF treatment (P < 0.05). Terminal deoxynucleotidyl transferase-mediated biotinylated deoxyuridine triphosphates nick end-labeling assay demonstrated that apoptosis was absent in FIF, whereas follicles from all other treatments showed positive labeling. Cell proliferation index was higher in isolated follicles from vitrified ovarian tissue and CVIF treatments than in follicles from FIF. Expression of Cx43 messenger RNA was lower in CVIF treatment when compared with follicles from all other treatments (P < 0.05). Follicle Cx37 messenger RNA levels did not show alterations in any treatment (P > 0.05). Cx37 and Cx43 immunolabeling was localized mainly on granulosa cells and oocytes, respectively. In conclusion, isolation of ovine secondary follicles could be done successfully after vitrification of ovarian tissue, and the basement membrane integrity remained intact after in vitro culture. Although the gene and protein expression of Cx37 did not change after vitrification of ovarian tissue, Cx43 turned out to be altered in secondary follicles after vitrification and in vitro culture.
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Affiliation(s)
| | - Jamily Bezerra Bruno
- Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza, Ceará, Brazil
| | - Laritza Ferreira de Lima
- Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza, Ceará, Brazil
| | | | | | | | | | | | - Valdevane Rocha Araújo
- Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza, Ceará, Brazil
| | - Carlos Henrique Lobo
- Group of Research in Biology of Reproduction, Department of Animal Science, Federal University of Ceará UFC, Fortaleza, Ceará, Brazil
| | - Arlindo de Alencar Araripe Moura
- Group of Research in Biology of Reproduction, Department of Animal Science, Federal University of Ceará UFC, Fortaleza, Ceará, Brazil
| | - Cláudio Cabral Campello
- Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza, Ceará, Brazil
| | - Johan Smitz
- Follicle Biology Laboratory, Center for Reproductive Medicine, UZ Brussel, Brussels, Belgium
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Lunardi FO, Chaves RN, de Lima LF, Araújo VR, Brito IR, Souza CEA, Donato MAM, Peixoto CA, Dinnyes A, Campello CC, de Figueiredo JR, Rodrigues APR. Vitrified sheep isolated secondary follicles are able to grow and form antrum after a short period of in vitro culture. Cell Tissue Res 2015; 362:241-51. [DOI: 10.1007/s00441-015-2181-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 03/25/2015] [Indexed: 11/24/2022]
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Henry L, Labied S, Fransolet M, Kirschvink N, Blacher S, Noel A, Foidart JM, Nisolle M, Munaut C. Isoform 165 of vascular endothelial growth factor in collagen matrix improves ovine cryopreserved ovarian tissue revascularisation after xenotransplantation in mice. Reprod Biol Endocrinol 2015; 13:12. [PMID: 25888918 PMCID: PMC4369824 DOI: 10.1186/s12958-015-0015-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 02/24/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Aggressive anti-cancer treatments can result in ovarian failure. Ovarian cryopreservation has been developed to preserve the fertility of young women, but early graft revascularisation still requires improvement. METHODS Frozen/thawed sheep ovarian cortical biopsies were embedded in collagen matrix with or without isoform 165 of vascular endothelial growth factor (VEGF165) and transplanted into ovaries of immunodeficient mice. Ovaries were chosen as transplantation sites to more closely resemble clinical conditions in which orthotopic transplantation has previously allowed several spontaneous pregnancies. RESULTS We found that VEGF165 significantly increased the number of Dextran-FITC positive functional vessels 3 days after grafting. Dextran- fluorescein isothiocyanate (FITC) positive vessels were detectable in 53% and 29% of the mice in the VEGF-treated and control groups, respectively. Among these positive fragments, 50% in the treated group displayed mature smooth-muscle-actin-alpha (alpha-SMA) positive functional vessels compared with 0% in the control group. CD31 positive murine blood vessels were observed in 40% of the VEGF165 transplants compared with 21% of the controls. After 3 weeks, the density of murine vessels was significantly higher in the VEGF165 group. CONCLUSION The encapsulation of ovarian tissue in collagen matrix in the presence of VEGF165 before grafting has a positive effect on functional blood vessel recruitment. It can be considered as a useful technique to be improved and further developed before human clinical applications in female cancer patients in the context of fertility preservation.
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Affiliation(s)
- Laurie Henry
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
- Department of Gynecology, University of Liège, Boulevard du XIIème de Ligne, B-4000, Liège, Belgium.
| | - Soraya Labied
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
- Department of Gynecology, University of Liège, Boulevard du XIIème de Ligne, B-4000, Liège, Belgium.
| | - Maïté Fransolet
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
| | - Nathalie Kirschvink
- Veterinary Integrated Research Unit, University of Namur, Rue de Bruxelles 61, B-5000, Namur, Belgium.
| | - Silvia Blacher
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
| | - Agnès Noel
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
| | - Jean-Michel Foidart
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
| | - Michelle Nisolle
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
- Department of Gynecology, University of Liège, Boulevard du XIIème de Ligne, B-4000, Liège, Belgium.
| | - Carine Munaut
- Laboratory of Tumor and Development Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA-R), University of Liège (B23) Sart-Tilman, B-4000, Liège, Belgium.
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Fransolet M, Labied S, Henry L, Masereel MC, Rozet E, Kirschvink N, Nisolle M, Munaut C. Strategies for using the sheep ovarian cortex as a model in reproductive medicine. PLoS One 2014; 9:e91073. [PMID: 24614306 PMCID: PMC3948732 DOI: 10.1371/journal.pone.0091073] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 02/07/2014] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE To evaluate and compare the distribution and density of primordial follicles within a whole sheep ovary and to gain insight into how to overcome the impact of natural follicular heterogeneity on the experimental results. DESIGN Histological study. SETTING Academic research center. ANIMALS Five- to nine-month-old ewes. INTERVENTIONS Freshly sampled whole sheep ovaries were collected and prepared for histological analysis. MAIN OUTCOME MEASURE(S) The follicular densities and distributions were determined for hematoxylin and eosin sections. A mathematical model was derived based on the follicle counts and Monte-Carlo simulations. RESULTS Heterogeneous distributions and densities of primordial follicles were identified 1) for distinct areas of the same ovarian cortex, 2) between the ovaries of the same animal and 3) across different ewes. A mathematical model based on the analysis of 37,153 primordial follicles from 8 different ovaries facilitated the estimation of the number of cortical biopsies and sections that had to be analyzed to overcome such heterogeneity. CONCLUSION The influence of physiological follicular heterogeneity on experimental and clinical results can be overcome when a definite number of cortical pieces and sections are taken into consideration.
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Affiliation(s)
- Maïté Fransolet
- Laboratory of Tumor and Developmental Biology, GIGA-R, University of Liège, Tour de Pathologie (B23), Sart Tilman, Liège, Belgium
| | - Soraya Labied
- Laboratory of Tumor and Developmental Biology, GIGA-R, University of Liège, Tour de Pathologie (B23), Sart Tilman, Liège, Belgium
| | - Laurie Henry
- Laboratory of Tumor and Developmental Biology, GIGA-R, University of Liège, Tour de Pathologie (B23), Sart Tilman, Liège, Belgium
| | - Marie-Caroline Masereel
- Laboratory of Tumor and Developmental Biology, GIGA-R, University of Liège, Tour de Pathologie (B23), Sart Tilman, Liège, Belgium
| | - Eric Rozet
- Analytical Chemistry Laboratory, CIRM, Institute of Pharmacy, University of Liège, and Arlenda s.a., Sart Tilman, Liège, Belgium
| | - Nathalie Kirschvink
- Veterinary Integrated Research Unit, Faculty of Sciences, Namur Research Institute for Life Sciences (NARILIS), University of Namur (UNamur), Namur, Belgium
| | - Michelle Nisolle
- Laboratory of Tumor and Developmental Biology, GIGA-R, University of Liège, Tour de Pathologie (B23), Sart Tilman, Liège, Belgium
- Department of Obstetrics and Gynecology, University of Liège, Hôpital la Citadelle, Liège, Belgium
| | - Carine Munaut
- Laboratory of Tumor and Developmental Biology, GIGA-R, University of Liège, Tour de Pathologie (B23), Sart Tilman, Liège, Belgium
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Abstract
Tissue transplantation and in vitro ovarian follicle culture have been investigated as alternative techniques to restore fertility in young women who are facing fertility-threatening diseases or treatments following ovarian tissue cryopreservation. Although transplants of fresh or frozen ovarian tissue have successfully yielded healthy live births in different species including humans, the risks of reintroducing cancer cells back into the patient, post treatment, have limited its clinical purpose. The in vitro ovarian follicle culture minimizes these risks and provides a way to harvest more mature oocytes, however its clinical translation has yet to be determined. Not only is it possible for tissue cryopreservation to safeguard fertility in cancer patients, this technique also allows the maintenance of germplasm banks for animals of high commercial value or for those animals that are at risk of extinction. Given the importance of managing female genetic material, this paper reviews the progress of the methods used to preserve and restore female fertility in different species to demonstrate the results obtained in the past 50 years of research, the current achievements and the future directions on this field.
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Lunardi FO, Araújo VR, Faustino LR, Carvalho ADA, Gonçalves RFB, Bass CS, Báo SN, Name KPO, Campello CC, de Figueiredo JR, Rodrigues APR. Morphologic, viability and ultrastructural analysis of vitrified sheep preantral follicles enclosed in ovarian tissue. Small Rumin Res 2012. [DOI: 10.1016/j.smallrumres.2012.04.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Carvalho A, Faustino L, Silva C, Castro S, Luz H, Rossetto R, Lopes C, Campello C, Figueiredo J, Rodrigues A, Costa A. Influence of vitrification techniques and solutions on the morphology and survival of preantral follicles after in vitro culture of caprine ovarian tissue. Theriogenology 2011; 76:933-41. [DOI: 10.1016/j.theriogenology.2011.04.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 04/15/2011] [Accepted: 04/22/2011] [Indexed: 10/17/2022]
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Amorim CA, Curaba M, Van Langendonckt A, Dolmans MM, Donnez J. Vitrification as an alternative means of cryopreserving ovarian tissue. Reprod Biomed Online 2011; 23:160-86. [DOI: 10.1016/j.rbmo.2011.04.005] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 03/10/2011] [Accepted: 04/14/2011] [Indexed: 10/18/2022]
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Cryopreservation of ovarian tissue: An emerging technology for female germline preservation of endangered species and breeds. Anim Reprod Sci 2010; 122:151-63. [DOI: 10.1016/j.anireprosci.2010.08.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 08/05/2010] [Accepted: 08/10/2010] [Indexed: 11/23/2022]
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Courbière B, Provansal M, Saias-Magnan J, Guillemain C, Noizet A, Grillo JM, Gamerre M. [What are at present the real hopes of pregnancy after ovarian cryopreservation?]. ACTA ACUST UNITED AC 2007; 35:666-77. [PMID: 17590374 DOI: 10.1016/j.gyobfe.2007.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2007] [Accepted: 05/16/2007] [Indexed: 11/19/2022]
Abstract
Survival rates for cancers that occur in childhood and adolescence have improved over the last decades, and preservation of future fertility in these patients has become a relevant issue. Premature ovarian failure is a consequence of exposing women to chemotherapeutic drugs and ionizing radiation. Ovarian cryopreservation is an alternative to cryopreservation of embryos or oocytes for theses patients. Ovarian cryopreservation aims to reimplant ovarian tissue after complete remission into the pelvic cavity (orthotopique site) or a heterotopic site like the abdominal wall or the forearm. In vitro folliculogenesis, that aims at the maturation of ovarian cortex primordial follicles cryopreserved for a FIV, is still in an experimental research stage. In this review, the objective was to evaluate the real hopes of pregnancy after ovarian cryopreservation. Indeed, many teams offer ovarian cryopreservation at present time, although only two pregnancies have been achieved to date. In both cases, it can be discussed whether the fertilized oocyte originated from the transplant or from the native ovary. Furthermore, the potential for reintroduction of cancerous cells may limit this technique in cancers that are known to have a risk of ovarian dissemination. The hopes engendered by ovarian cryopreservation, but also its limits, must be explained to the patients before an ovarian surgery for cryopreservation.
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Affiliation(s)
- B Courbière
- Service de Gynécologie-Obstétrique et Centre d'Assistance Médicale à la Procréation (AMP), Hôpital de La Conception, 147 Boulevard Baille, 13385 Marseille cedex 05, France.
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