Endometrial Receptivity
The temporary state of the endometrium when it is capable of accepting and supporting embryo implantation.
Full Definition
Endometrial receptivity refers to the brief window during the menstrual cycle when the endometrial lining is optimally prepared for embryo implantation. This receptive phase, also known as the implantation window, typically occurs 6-10 days after ovulation and is characterized by specific molecular and morphological changes. Assessment of endometrial receptivity involves evaluating factors such as endometrial thickness, pattern, and molecular markers. In assisted reproductive technology, timing embryo transfer to coincide with the receptive phase is critical for achieving pregnancy. Disrupted endometrial receptivity is a significant cause of implantation failure in otherwise successful ART cycles.
Usage
Usage note: Distinguish from simple endometrial thickness measurements.
In Context
- "Endometrial receptivity testing revealed a delayed implantation window requiring cycle adjustment." — Clinical consultation note
- "Optimal endometrial receptivity is essential for successful frozen embryo transfer outcomes." — Patient education material