Management of unexplained infertility

INTERVENTION: Patients will be randomized into two groups: Group A: cervical mucus removal group Group B: non‐cervical mucus removal group, where only the external cervical os will be cleaned CONDITION: Cervical mucus removal ; Pregnancy and Childbirth PRIMARY OUTCOME: Clinical pregnancy rate (defined as ultrasound evidence of pregnancy or products of conception identified by histopathological examination) per patient at 2 weeks following IUI INCLUSION CRITERIA: 1. Women aged 35 years or less 2. Body mass index (BMI) 30 kg/m2 or less 3. Diagnosis of unexplained infertility. The diagnosis of unexplained infertility was made according to the following points: normal semen analysis based on World Health Organization criteria (11), a preliminary transvaginal scan (TVS) on Day 2 of the cycle is normal with no detected ovarian pathology, normal (<10 IU/ml) follicular stimulating hormone (FSH) and luteinizing hormone (LH) measured on Day 2 of the cycle, normal serum prolactin level, normal thyroid function, midluteal serum progesterone levels >10 mg/dL, normal uterine cavity on hysterosalpingography or hysteroscopy, and patent tubes of normal appearance on hysterosalpingography and/or laparoscopy.