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Updated: Jun 13, 2026
Establishment of an Embryo Implantation Model In Vitro
Published on: June 21, 2024
Ovarian stimulation retards postimplantation development and alters global gene expression profile of blastocysts in
Xinyan Zhang1, Li Wang, Xiuli Li
1Department of Obstetrics and Gynecology, General Hospital of the People's Liberation Army, Beijing, People's Republic of China.
Abstract:
This study compares the quality, developmental capacity and global gene expression profile of embryos generated from superovulated and natural cycles. We found that ovarian stimulation impaired quality of blastocysts (cell number: 68.9 +/- 6.9 vs. 76.8 +/- 7.9; diameter of blastocysts: 145.3 +/- 76.9 microm vs. 152.6 +/- 65.5 microm), fetus development (rate of development to term: 45.5% vs. 69.1%; weight of 18.5-dpc fetuses: 1.23 +/- 0.03 g vs. 1.34 +/- 0.03 g) and caused 92 genes differentially expressed.
Insights
Superovulation in animals negatively impacts embryo quality, fetal development, and gene expression compared to natural cycles. Ovarian stimulation affects blastocyst quality and leads to significant gene expression changes.
Area of Science:
- Reproductive Biology
- Developmental Biology
- Genomics
Background:
- Ovarian stimulation protocols are widely used in assisted reproductive technologies.
- Understanding the impact of superovulation on embryo development and gene expression is crucial for optimizing reproductive outcomes.
Purpose of the Study:
- To compare the quality, developmental potential, and global gene expression profiles of embryos derived from superovulated versus natural reproductive cycles.
- To investigate the effects of ovarian stimulation on blastocyst development and subsequent fetal growth.
Main Methods:
- Embryos were generated from superovulated and natural cycles in a model system.
- Blastocyst quality was assessed by cell number and diameter.
- Fetal development was evaluated by the rate of development to term and fetal weight.
- Global gene expression profiling was performed using transcriptomic analysis.
Main Results:
- Superovulation resulted in impaired blastocyst quality, evidenced by reduced cell number and diameter.
- Embryos from superovulated cycles showed a lower rate of development to term and decreased fetal weight.
- Ovarian stimulation led to 92 differentially expressed genes compared to natural cycles.
Conclusions:
- Ovarian stimulation negatively impacts embryo quality and developmental capacity.
- Superovulation alters the global gene expression profile of embryos.
- Natural reproductive cycles are associated with superior embryo development and gene expression patterns.
