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Updated: Jun 15, 2026

The Immediate Partial Removal of Cumulus-Oocyte Complexes: A Refined Approach for Rapid Observation of In Vitro Fertilization
Published on: October 18, 2024
The effectiveness of clomiphene citrate in LH surge suppression in women undergoing IUI: a randomized controlled
Hesham Al-Inany1, Hamdy Azab, Waleed El-Khayat
1Department of Obstetrics and Gynecology, Cairo University, Cairo, Egypt. kaainih@yahoo.com
Objective:
To study the effectiveness of clomiphene citrate (CC) in preventing a premature LH surge during controlled ovarian stimulation in women undergoing assisted reproduction.
Design:
Prospective, randomized, controlled trial.
Setting:
University hospital.
Patient(S):
Two-hundred thirty couples with mild male factor, or unexplained infertility.
Intervention(S):
Couples were randomized to receive human menopausal gonadotrophins (hMG) followed by CC or hMG alone until the day of hCG.
Main Outcome Measure(S):
The primary outcomes were the incidence of a clinical pregnancy and premature LH rise. Secondary outcomes were the E2 levels, number of mature follicles, and endometrial thickness as determined on the day of hCG.
Result(S):
The number of patients who had a premature LH surge was significantly lower in the hMG+CC group (5.45% vs. 15.89%). Additionally, the mean E2 levels (pg/mL) and the number of mature follicles were also significantly higher in the hMG+CC group (360.3±162.9 vs. 280±110.0 and 2.4±0.97 vs. 1.3±1.1, respectively), although there was no significant difference regarding number of canceled cycles, endometrial thickness, or clinical pregnancy rate.
Conclusion(S):
The addition of CC to hMG has been proven to be effective in reducing premature LH surges without compromising the pregnancy rate.
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