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Updated: Apr 24, 2026
A Neural Network-Based Identification of Developmentally Competent or Incompetent Mouse Fully-Grown Oocytes
Published on: March 3, 2018
Deliveries of babies with normal health derived from oocytes with smooth endoplasmic reticulum clusters
Hiromitsu Hattori1, Yusuke Nakamura, Yukiko Nakajo
1Kyono ART Clinic, Mitsui-Seimei, Sendai Honcho Bl, 3F, 1-1-1 Honcho, Aoba-ku, Sendai, Miyagi, 980-0014, Japan.
Purpose:
To examine the impact on development of derived embryos from smooth endoplasmic reticulum clusters (SERC) in human metaphase II (MII) oocytes.
Methods:
Retrospective analysis at Kyono ART Clinic. Comparison of embryological development, pregnancy, live birth and fetal malformation between oocytes with SERC (the SERC(+) group) and those without (the SERC(-) group) in 2,158 patients (3,758 cycles) after ICSI.
Results:
Fertilization and implantation rate were significantly lower in SERC(+) MII oocytes than in SERC(-) MII oocytes. After the transfer of fresh and vitrified embryos derived from SERC(+) oocytes, 14 pregnancies resulted in 14 healthy babies, including 2 from fresh embryo transfer (ET) and 12 from vitrified-warmed ET, with no malformations.
Conclusion(S):
The presence of SERC in MII oocytes was associated with significantly lower fertilization rates and implantation rates than seen in SERC(-) MII oocytes within SERC (+) cycles. However, SERC had no impact on post-implantation development as well as neonatal outcome.
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