NCT05632731

Comparison of Clinical Outcomes in Fresh Cycle With Single Blastocyst Stage and Double Cleavage-stage Embryos: a Single-center, Non-blind, Randomized Controlled Study

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 1,236 (estimated)
• Sponsor: Women's Hospital School Of Medicine Zhejiang University · Academic / Other
• Sex: Female
• Age: 18 Years – 38 Years
• Healthy volunteers: Not accepted

Summary

In traditional assisted reproductive technology (ART), choosing multiple embryo transfer to get a high clinical pregnancy rate while increasing the risk of multiple pregnancies. Research showed that the single-cleavage embryo transfer could not simultaneously meet the dual requirements of maintaining pregnancy rate and reducing the multiple pregnancy rate.The purpose of this study was to observe the clinical outcome between double cleavage embryo transfers and single blastocyst transfers in fresh cycle through RCT study with GnRH antagonist protocol.

Detailed description

In traditional assisted reproductive technology (ART), choosing multiple embryo transfer to get a high clinical pregnancy rate while increasing the risk of multiple pregnancies. Research showed that in the fresh cleavage embryo transfer cycle, the clinical pregnancy rate increased with the increase of the number of high-quality embryos transferred, and so did the multiple pregnancy rate, suggesting that the single-cleavage embryo transfer could not simultaneously meet the dual requirements of maintaining pregnancy rate and reducing the multiple pregnancy rate. Compared with the embryo at cleavage stage, blastocyst culture is a process of survival of the fittest, which is physiologically more synchronized with endometrial development and can improve embryo implantation rate. The existing clinical research analysis is mostly limited to the down-regulating regimen, while the RCT study of high-quality with GnRH antagonist protocol is few. Therefore, the purpose of this study was to observe the clinical outcome between double cleavage embryo transfers and single blastocyst transfers in fresh cycle through RCT study with GnRH antagonist protocol.

Conditions

• Infertility, Female

Interventions

Type	Name	Description
PROCEDURE	double cleavage-stage or single blastocyst stage embryos transfer	Infertile women requesting in vitro fertilization treatment were randomly assigned to undergo transfer of either two cleavage-stage embryos or a single blastocyst-stage embryo.

Timeline

• Start date: 2022-12-01
• Primary completion: 2024-08-01
• Completion: 2024-12-01
• First posted: 2022-12-01
• Last updated: 2022-12-01