Related Experiment Video
Updated: May 11, 2026
Establishment of an Embryo Implantation Model In Vitro
Published on: June 21, 2024
Ovarian stimulation leads to a severe implantation defect in mice
Shaorong Deng1, Jing Xu, Jianwu Zeng
1Department of Chinese Herbs, Tongji School of Pharmacy, Wuhan 430030, China.
Abstract:
The aim of the present study was to evaluate whether ovarian stimulation could induce embryo implantation dysfunction in mice and to explore the possible mechanisms involved. Ovarian stimulation was performed with intraperitoneal injections of 0, 2.5, 5.0, 7.5 and 10.0 IU pregnant mare serum gonadotrophin followed by the same dose of human chorionic gonadotrophin 48h later. A dose-dependent implantation defect in stimulated mice was demonstrated, which can be mainly explained by premature luteolysis and secondary endometrial changes induced by an imbalance in oestradiol and progesterone.
Insights
Ovarian stimulation in mice can cause embryo implantation defects. This is linked to premature luteolysis and endometrial changes due to hormone imbalance.
Area of Science:
- Reproductive Biology
- Endocrinology
- Developmental Biology
Background:
- Ovarian stimulation is a key component of assisted reproductive technologies.
- Understanding its potential side effects on early pregnancy is crucial.
Purpose of the Study:
- To investigate if ovarian stimulation induces embryo implantation dysfunction in mice.
- To elucidate the underlying mechanisms of this potential dysfunction.
Main Methods:
- Mice underwent ovarian stimulation using varying doses of pregnant mare serum gonadotropin (PMSG) followed by human chorionic gonadotropin (hCG).
- Implantation success and endometrial receptivity were assessed.
Main Results:
- A dose-dependent implantation defect was observed in stimulated mice.
- This defect correlated with premature luteolysis (corpus luteum breakdown).
- Secondary endometrial changes resulted from an oestradiol and progesterone imbalance.
Conclusions:
- Ovarian stimulation protocols can lead to embryo implantation dysfunction.
- Hormonal imbalances, specifically affecting oestradiol and progesterone, are implicated.
- Premature luteolysis and subsequent endometrial alterations are key mechanisms involved.
