Research Paper: Clomiphene Citrate to Inducte Ovulation in Females With Unexplained Infertility: A Randomized, Controlled, Clinical Trial

Document Type : Original Articles


1 Department of Obstetrics and Gynecology, Faculty of Medicine, Ain Shams University, Cairo, Egypt.

2 Department of Obstetrics and Gynecology, El-Galaa Teaching Hospital, Cairo, Egypt.



Objectives: The current study aimed at comparing the efficacy of Clomiphene Citrate (CC) for the expectant management of unexplained infertility in females over 3 successive cycles.Materials: The present randomized, controlled, clinical trial was carried out at Ain Shams University Maternity Hospital. Females with unexplained infertility for at least 12 months of unprotected regular marital life were enrolled. Eligible females were randomly assigned into one of the 2 following groups: group 1 received 100 mg CC once a day for 5 days, and group 2 was expectantly followed up without induction of ovulation. The primary outcome was the clinical pregnancy rate. Results: A total of 113 females were enrolled in the current trial. The mean age of the subjects was 25.3±3.1 years; ranged 20 to 33. The clinical pregnancy rate was slightly, but significantly, higher in CC group compared with the controls; both per case (7/57 vs. 4/56, 12.3% vs. 7.1%, respectively; P=0.357; Relative Risk (RR)=1.72; 95% Confidence Interval (CI)=0.53, 5.55; Number Needed to Treat (NNT)=19) and per cycle (7/163 vs. 4/160, 4.3% vs. 2.5%, respectively; P=0.374; RR=1.72; 95% CI=0.51, 5.75; NNT=56).Discussion: CC seems to be not effective in improving clinical pregnancy outcome compared with observation alone in females with unexplained infertility.


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