The serum oestradiol/progesterone ratio on the day of OPU + 7, but not the day of OPU + 5, affects the rates of live birth in fresh blastocyst embryo transfer cycles

• Main Authors: Wenxian Zhao (Author), Honglu Diao (Author), Xin Chen (Author), Shaoyuan Xu (Author), Shengfang Jiang (Author), Hong Cao (Author), Changjun Zhang (Author), Ying Zhang (Author)
• Format: Book
• Published: BMC, 2023-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Abstract Background In an in vitro fertilization (IVF) cycle, the embryo ends its wandering time and begins the process of implantation into the uterine cavity on the seventh day after oocyte pick-up (OPU + 7), which is closer than OPU + 5 to the time of nidation. Therefore, measuring the oestradiol...