Caesarean Section and Intracytoplasmic Sperm Injection (ICSI) Outcome

All women in both groups will receive oral estradiol valerate 8 mg/ day from the second day of the menstrual cycle. Endometrial thickness will be assessed by vaginal ultrasonography at the tenth day of treatment. When endometrial thickness reached ≥ 7 mm all subjects, in addition to estrogen, they will receive progesterone vaginal suppositories 400 mg twice daily and 100 mg of progesterone intramuscularly daily. Frozen thawed embryo transfer will be at day 6 of progesterone. Estrogen and progesterone will be continued until 9-10 weeks of gestation