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Erschienen in: Journal of Assisted Reproduction and Genetics 10/2019

09.08.2019 | Gamete Biology

Biphasic in vitro maturation (CAPA-IVM) specifically improves the developmental capacity of oocytes from small antral follicles

verfasst von: Flor Sanchez, Anh H. Le, Vu N. A. Ho, Sergio Romero, Heidi Van Ranst, Michel De Vos, Robert B. Gilchrist, Tuong M. Ho, Lan N. Vuong, Johan Smitz

Erschienen in: Journal of Assisted Reproduction and Genetics | Ausgabe 10/2019

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Abstract

Purpose

To investigate the effectiveness of a biphasic IVM culture strategy at improving IVM outcomes in oocytes from small follicles (< 6 mm) compared with routine Standard IVM in patients with polycystic ovaries.

Methods

This prospective pilot study was performed in 40 women with polycystic ovaries whose oocytes were randomized to two IVM culture methods. Patients received a total stimulation dose of 450 IU rFSH. Cumulus-oocyte complexes (COCs) from follicles < 6 mm and ≥ 6 mm were retrieved and cultured separately in either a prematuration medium with c-type natriuretic peptide followed by IVM (CAPA-IVM), or STD-IVM. Primary outcomes were maturation rate, embryo quality, and the number of vitrified day 3 embryos per patient.

Results

Use of the CAPA-IVM system led to a significant improvement in oocyte maturation (p < 0.05), to a doubling in percentage of good and top-quality day 3 embryos per COC, and to an increased number of vitrified day 3 embryos (p < 0.001), compared to STD IVM. Oocytes from follicles < 6 mm benefited most from CAPA-IVM, showing a significant increase in the amount of good and top-quality embryos compared to STD IVM. CAPA-IVM yielded significantly (p < 0.0001) less GV-arrested oocytes and larger oocyte diameters (p < 0.05) than STD IVM.

Conclusions

CAPA-IVM brings significant improvements in maturation and embryological outcomes, most notably to oocytes from small antral follicles (< 6 mm), which can be easily retrieved from patients with a minimal ovarian stimulation. The study demonstrates the robustness and transferability of the CAPA-IVM method across laboratories and populations.
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Metadaten
Titel
Biphasic in vitro maturation (CAPA-IVM) specifically improves the developmental capacity of oocytes from small antral follicles
verfasst von
Flor Sanchez
Anh H. Le
Vu N. A. Ho
Sergio Romero
Heidi Van Ranst
Michel De Vos
Robert B. Gilchrist
Tuong M. Ho
Lan N. Vuong
Johan Smitz
Publikationsdatum
09.08.2019
Verlag
Springer US
Erschienen in
Journal of Assisted Reproduction and Genetics / Ausgabe 10/2019
Print ISSN: 1058-0468
Elektronische ISSN: 1573-7330
DOI
https://doi.org/10.1007/s10815-019-01551-5

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