NCT04455191

Comparison of Thawing Embryos in Advance and on the Day of Transfer on Pregnancy Outcomes in FET Cycle

Comparison of the Effects of Thawing Embryos in Advance and Thawing on the Day of Transfer on Pregnancy Outcomes in the Frozen Embryo Transfer Cycle

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 500 (estimated)
• Sponsor: Jinan Central Hospital · Academic / Other
• Sex: Female
• Age: 25 Years – 35 Years
• Healthy volunteers: Accepted

Summary

Respectively for patients with repeated transplant failure and routine patients, Thawing frozen embryos in advance (18h) to extend the duration of embryonic development or thawing embryos on the day of transfer in the frozen embryo transfer cycle, to analyze which way can improve clinical pregnancy outcomes, is there a significant difference between the two ways or two types of patients?

Detailed description

Although in clinical practice, thawed embryos with appropriate development time will be selected strictly according to the number of days after ovulation, there are still two problems in actual clinical treatment: one is the embryonic factor, although the rate of embryonic development is generally the same, However, the phenomenon of delayed embryo division and development often occurs. The second is the endometrial factor. There are reports that a small number of people will move the transplant window forward, or the transplant window is narrow. This potentially creates the risk of embryo-endometrial mismatch. Based on this, the research team focused on patients with frozen embryo transfer cycles and put forward the strategy of "thawing embryos in advance and prolonging the development period of embryos properly" in an effort to achieve better repair of damage caused by embryo freezing and fine-tuning of embryo-endometrial interaction time. Therefore, it is necessary to compare thawing embryos in advance and thawing on the day of transfer on pregnancy outcomes in patients with repeated transplant failure and routine patients respectively. The purpose of this study is to analyze which way can improve clinical pregnancy and birth outcomes, is there a significant difference between the two ways or two types of patients?

Conditions

• In Vitro Fertilization
• Frozen Embryo Transfer

Interventions

Type	Name	Description
PROCEDURE	Thawing Embryos in Advance	Thaw Embryos one day in Advance
PROCEDURE	Thawing Embryos on the Day of Transfer	Thaw Embryos on the morning of transfer day.

Timeline

• Start date: 2020-01-01
• Primary completion: 2021-05-31
• Completion: 2021-06-30
• First posted: 2020-07-02
• Last updated: 2020-07-07

Locations

1 site across 1 country: China