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Updated: Feb 23, 2026
08:51
Human Egg Maturity Assessment and Its Clinical Application
Published on: August 19, 2019
20.2K
Unexpected repeat immature oocyte response after IVF stimulation: a case report.
Vandana Mishra1, Lakshmi Chirumamilla1
1a Obstetrics & Gyneocology , Nova IVI Fertility , Hyderabad , India.
Summary
In vitro fertilization (IVF) aims for mature eggs, but some patients yield immature eggs even after stimulation. This case highlights a challenge in achieving oocyte maturation despite standard protocols.
Area of Science:
- Reproductive Endocrinology
- In Vitro Fertilization (IVF)
Background:
- Ovarian stimulation aims to retrieve mature metaphase II oocytes for fertilization in IVF.
- Immature oocytes (germinal vesicle or metaphase I) can arrest development despite controlled ovarian stimulation (COS) and appropriate human chorionic gonadotrophin (hCG) trigger.
Observation:
- A case is presented involving two IVF cycles where oocytes remained at the immature metaphase I stage.
- Despite normal follicle growth, estradiol rise, and dual triggers (recombinant hCG and GnRH agonist), oocyte maturation failed.
Findings:
- The study observed a failure to retrieve mature oocytes in two IVF cycles, with all retrieved oocytes arrested at the metaphase I stage.
- This occurred despite successful controlled ovarian stimulation and the use of both recombinant hCG and a GnRH agonist as triggers.
Implications:
- This case underscores a potential, unexplained oocyte maturation defect in some patients undergoing IVF.
- Further investigation is needed to understand and address the causes of oocyte immaturity despite optimal stimulation protocols.
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