The Impact of Endometrial Compaction on Assisted Reproductive Technology Outcome

"Blood sampling:~Serum P4 \& estradiol will be performed on the day of triggering and on the day of embryo transfer. Progesterone/ Estradiol (P4/E2) ratio will be calculated Ultrasound: On triggering day, at time of ovum pick up and on ET day, we will measure~1. Endometrial thickness~2. Endometrial pattern~3. Endometrial compaction: the difference in measurement of endometrial thickness between the day of embryo transfer and the day of triggering.~4. Junctional zone thickness~5. Uterine contraction (peristalsis).~6. Blood flow of uterine vessels: PI of the uterine arteries will be calculated also Endometrial - sub endometrial blood flow"