Endometrial Volume and Sub-endometrial Vascularity as Predictors of In-vitro Fertilization Success

100 patients aged 21-40 years old, diagnosed as primary or secondary infertility These patients are then assigned to receive ICSI treatment (ovulation induction, . They undergo a 3D vaginal ultrasound before treatment to measure the junctional zone thickness and followed up after treatment to determine the rate of implantation. Intervention(s) All patients will undergo 3D ultrasound to measure the thickness of the junctional zone at day 21 of the cycle.