Preovulatory Uterine Flushing With Saline as a Treatment for Unexplained Infertility

Inclusion Criteria: * Primary or secondary infertility ≥12 months. * Diagnosis of unexplained infertility ≤24 months: * Anti-Mullerian hormone ≥0.4 ng/mL and/or follicle-stimulating hormone ≤13 IU/L in early follicular phase; * regular cycle of 21-35 days, * positive ovulation tests, and/or * luteal phase serum progesterone ≥25mmol/L in a natural cycle; * semen analysis with total motile sperm count ≥ 5 million; * normal uterine cavity; * patent tubes. * Negative genitourinary test for gonorrhoea and chlamydia ≤12 months. Exclusion Criteria: * Body mass index ≥35 kg/m2. * Ongoing pregnancy.