ArticleLife (Basel, Switzerland)2023
Outcomes of Different In Vitro Maturation Procedures for Oocyte Cryopreservation for Fertility Preservation and yet Another Live Birth in a Cancer Patient.
Article in Life (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 13 citations in OpenAlex.
- Ovarian tissue oocyte-in vitro maturation combined with ovarian tissue cryopreservation: a promising urgent fertility preservation strategy for hematological patients before HSCT.Journal of ovarian research · 2026Article
- Female fertility preservation: 25 years of progress, expanding indications and future prospects.Human reproduction update · 2026Review
- Clinical outcomes over 12 years: a comparative analysis of oocyte cryopreservation from controlled ovarian stimulation and in vitro maturation retrieved from ovarian tissue.Journal of ovarian research · 2025Article
- Rescue in vitro maturation of germinal vesicle oocytes after ovarian stimulation: the importance of the culture media.Human reproduction (Oxford, England) · 2025Article
- Pro-cumulin addition in a biphasic in vitro oocyte maturation system modulates human oocyte and cumulus cell transcriptomes.Molecular human reproduction · 2025Article
- Successful pregnancy using immature oocytes retrieved from resected borderline ovarian tumor: a case report and literature review.Contraception and reproductive medicine · 2024Article
- Restoring Ovarian Fertility and Hormone Function: Recent Advancements, Ongoing Efforts and Future Applications.Journal of the Endocrine Society · 2024Review
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6 authors at 1 institution in 2 countries.
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Abstract
To ensure patient care in an oncological fertility preservation (FP) programme, specialists must provide technology that best suits the patients' clinical conditions. In vitro oocyte maturation (IVM) and ovarian tissue cryopreservation (OTC) are possible fertility preservation treatments for women in need of urgent oncological treatment. IVM consists of the retrieval of immature oocytes from small antral follicles, with no or minimal ovarian stimulation by gonadotropins. Therefore, IVM has become a pertinent option for fertility preservation, especially for cases whereby ovarian stimulation is unfeasible or contra-indicated. Existing data on immature oocytes, retrieved transvaginally (OPU-IVM) or extracted from ovarian tissue 'ex vivo' (OTO-IVM), are still limited on technical consistency, efficacy, and safety. The present retrospective cohort study includes 89 women undergoing fertility preservation using IVM methodologies and 26 women undergoing ovarian stimulation (OS) in concomitant period. In total, 533 immature oocytes were collected from IVM patients, achieving a maturation rate of 57% and 70% in OTO-IVM and 73% and 82% in OPU-IVM at 24 h and 48 h in culture, respectively. The observed high maturation rates might be due to the use of patients' serum in its innate status, i.e., without heat-inactivation. This permitted 7.6 ± 5.7 and 4.6 ± 4.9 oocytes to be vitrified in OTO-IVM and OPU-IVM, respectively, compared to 6.8 ± 4.6 from OS patients. Regarding OS patients, two of them underwent embryo transfer following the insemination of warmed oocytes after complete remission, resulting in a single live birth from one patient. Upon follow-up of two OTO-IVM patients after the termination of their oncological treatment, a total of 11 warmed oocytes lead to a transfer of a single embryo, but pregnancy was not achieved. From OPU-IVM, six embryos were transferred in three patients 4.25 years after oocyte vitrification, leading to the live birth of a healthy boy. The present case of live birth is among the first cases reported so far and supports the notion that IVM might be a relevant and safe FP option for cancer patients when oocyte preservation is required but ovarian stimulation is contra-indicated.
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