Inclusion Criteria:  Women between 18 and 38 years old.  An indication for IVF/ICSI.. Women with BMI between 18.5 : 29.9 . Women with normal antimullerian hormone(AMH), antral follicle count(AFC) (good responders).  Exclusion Criteria:  Refusal to join the study.  Women with age less than 18 and more than 38 . Women with BMI less than 18.5 and more than 30 . Untreated tubal hydrosalpinges. Poor responders as assessed by AFC 4 or less ,AMH O.8 ng/dl (nice 2013).