Although many studies have evaluated the relationship between endometrial thickness and IVF outcome, the results are still controversial. We notice that, during our daily work, for patients undergoing cleavage stage embryo transfer, endometrial thickness seems to have a huge impact on IVF outcome; however, for blastocyst stage embryo transfers, IVF outcome seems to have little association with endometrial thickness. Thus, the aim of this prospective observational study is to explore the relationship between endometrial thickness and IVF outcome in patients undergoing cleavage stage and blastocyst stage embryo transfers, respectively.
Study Type
OBSERVATIONAL
Enrollment
500
For fresh cycles, embryos were transferred 3-5 days after oocyte retrieval; For frozen thawed cycles, embryos were transferred 3-5 days after starting to use progesterone based on the stage of cryopreservation.
Reproductive Medical Center, First Affiliated Hospital of Zhengzhou University
Zhengzhou, Henan, China
RECRUITINGOngoing pregnancy rate
An ongoing pregnancy was defined as a pregnancy with a positive heartbeat by ultrasound after 12 weeks gestation.
Time frame: 12 weeks after embryo transfer
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.