Inclusion Criteria:  Women with primary or secondary infertility due to unexplained infertility The age group of these women was 25-35 years BMI 18.5-29.9 kg/m2 Normal hormone profile (FSH <10 mIU/ml on day 2-3 and AMH more than 1) Euthyroid state or controlled thyroid state Bilateral free spill on HSG  Exclusion Criteria:  Patients with severe male factor infertility; serum analysis count < 10 million sperms /mL - sperm motility<15% - 96%<abnormal morphology) Stage III or IV endometriosis Bilateral tubal factor infertility Premature ovarian failure Polycystic ovary syndrome Uterine cavity abnormality Recurrent spontaneous abortion