Selection of high-quality and viable blastocysts based on timing of morula compaction and blastocyst formation

Reproductive medicine and biology

article

Yoshihisa Harada¹  Tomoyo Maeda¹  Emi Fukunaga¹  Reiko Shiba¹  Shinichiro Okano¹  Masayuki Kinutani¹  Toshitaka Horiuchi² 

[1] Kinutani Women’s Clinic;Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima

关键词: blastocyst quality;    compaction;    intracytoplasmic sperm injection;    time‐lapse imaging;   

DOI  :  10.1002/rmb2.12302

学科分类：工业工程学

来源: Wiley

【 摘 要 】

Purpose: The time‐lapse system is a device that allows continuous monitoring with‐ out removing embryos from the incubator. Using a time‐lapse system, we retrospec‐ tively investigated cleavage speed time points as potential indicators for selecting high‐quality viable blastocysts. Methods: This study included 963 zygotes of two pronuclei retrieved from 196 patients between January 2015 and December 2016. All embryos in culture were monitored by time‐lapse after intracytoplasmic sperm injection. Of 492 blastocysts developed in vitro, 128 vitrified‐warmed single blastocyst transfers were classified into pregnancy and non‐pregnancy groups, and the parameters were compared. Results: In the pregnancy group, timing of both morula compaction and regu‐ lar blastocyst formation was significantly faster than in the non‐pregnancy group. Furthermore, the optimal cutoff values for compacted morula (94.9 hours) and regu‐ lar blastocyst (113.9 hours) were determined using the receiver operator character‐ istic curve analysis. Embryos that formed compacted morulae within 94.9 hours and developed into regular blastocysts within 113.9 hours were associated with a signifi‐ cantly higher pregnancy rate than those that did not (44.4% vs 16.0%). Conclusion: The timing of morula compaction and regular blastocyst formation is important as an indicator of high‐quality blastocysts to increase odds for pregnancy after embryo transfer.

【 授权许可】

CC BY|CC BY-NC|CC BY-NC-ND