NCT03381001

Influence of Post-thaw Embryo Culture Interval on Assisted Reproduction Success Rates

Influence of Post-thaw Embryo Culture Interval Before Embryo Transfer on Assisted Reproduction Success Rates

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 268 (actual)
• Sponsor: Federal University of Minas Gerais · Academic / Other
• Sex: Female
• Age: 18 Years – 50 Years
• Healthy volunteers: Not accepted

Summary

The transfer of frozen / thawed embryos has been routinely performed in the last 30 years as part of Assisted Reproduction treatment (ART). Currently, more than 50% of couples submitted to ART have surplus embryos eligible for freezing followed by transfer in subsequent cycles. Therefore the selection criteria for the thawed embryos to be transferred must be rigorous in order to maximize pregnancy and of live birth rates. Usually, the evaluation of the embryos before transfer can be performed based on blastomeres survival after a short culture period between thaw and embryos transfer, i.e., 2 to 5 hours, or based on embryo development over a prolonged period of culture (18h to 24h). Post-thaw embryo culture might have an impact on the recovery of mitosis and normal cellular functions. However, until now, there is no consensus in the literature on which post-thaw culture interval has a better impact on pregnancy and live birth rates. Also, blastocysts formation after freezing/thawing of embryos at cleavage stage may bring relevant information about post-thaw culture. Moreover, this strategy can be used as an alternative treatment. Therefore, the authors proposed this prospective randomized, triple-blind study to evaluate the impact of post-thaw embryo culture on the pregnancy and live birth rates.

Conditions

• Infertility

Interventions

Type	Name	Description
PROCEDURE	embryo transfer after thaw and culture	embryos will be kept in culture after thawing for one day before transfer for the uterus
PROCEDURE	embryo transfer with no culture	embryos will be transfer with no culture after thaw

Timeline

• Start date: 2017-06-15
• Primary completion: 2019-06-15
• Completion: 2019-08-10
• First posted: 2017-12-21
• Last updated: 2019-08-14

Locations

1 site across 1 country: Brazil