Background: Assisted reproductive techniques (ART) include all fertility treatments in which the gametes (egg and sperm) are handled outside the human body with the aim of achieving a healthy conception. Common ART procedures include in vitro fertilization (IVF) with or without intracytoplasmic sperm injection (ICSI), fresh or frozen embryo transfer, and IVF with donor oocytes.  Luteal phase support through pharmaceutical drugs has been universally agreed.
Objective: To compare the effectiveness of different types of vaginal progesterone preparations for luteal support in patients undergoing Intracytoplasmic Sperm Injection.
Patients and Methods: The current randomized controlled clinical trial study was conducted on 300 patients who were following at the Assisted Reproductive Technology (ART) unit of the International Islamic Center for Population Studies and Research (IICPSR) of Al-Azhar University over the period from May 2016 to January 2018 after being approved by the ethical committee. The patients were divided into 3 equal groups received Prontogest vaginal suppositories 400 mg once per day, Group B received Crinone 8% (90 mg) vaginal gel once per day and Group C received Endometrin vaginal suppositories once per day.
Results: Comparison between studied group A (Prontogest), group B (Crinone) and group C (Endometrin) as regards demographic characteristics revealed no statistically significant differences. As regards the cause of infertility, a statistically significant increase in the number of patients with male and tubal factors in group B (Crinone) than group A (Prontogest). Concerning the laboratory hormonal profile of the studied groups before ICSI, there was a statistically significant increase in FSH and LH levels in group A (Prontogest) than group B (Crinone) and group C (Endometrin).  On the other hand, there was a difference between the studied groups as regards prolactin and estrogen levels, but did not reach statistical significance. Comparison between studied groups, as regards Endometrial thickness, number of retrieved oocytes and number of transferred embryos revealed no statistically significant difference. Comparison between the studied groups, as regards pregnancy rates, revealed a statistically significant increase in pregnancy rates in group C than group A.
Conclusion: The use of Endometrin vaginal suppositories in patients undergoing ICSI had a statistically significant higher clinical pregnancy rates in comparison to Prontogest vaginal suppositories.  On the other hand, Crinone vaginal gel had a higher clinical pregnancy rate than Prontogest.