Women fulfilling inclusion criteria were randomely allocated,using sealed envelops, into two equal groups. Group with embryo freezing alone (Control group) or while the other group additionally receives cetrotide subcutaneous injection in a daily dose of 0.25 mg started on day of oocyte retrieval for 3 days (Study group). Symptomatic treatment for associated symptoms as analgesics, antiemetics and antispasmodics are also prescribed. Patients are categorized according to classification grading of OHSS.