Isotretinoin vs hCG for Male Infertility

This trial examines two treatments for men with low or no sperm production. The study compares isotretinoin, typically used for skin issues, with hCG, a hormone therapy already applied to some infertility cases. Participants will take one of these treatments for three months to assess its effect on sperm count and motility. Suitable candidates are men aged 19 to 50 with a confirmed low sperm count or no sperm due to non-obstructive causes, without any correctable reason for their infertility. The research aims to discover better treatments for male infertility. As a Phase 2 trial, it focuses on evaluating the treatment's effectiveness in a smaller group, allowing participants to contribute to advancements in infertility treatments.

If you are currently using medications known to impair sperm production, like testosterone or anabolic steroids, you will need to stop them and have a washout period (time without taking these medications) before joining the trial. If you are using isotretinoin for any reason, you cannot participate in the trial.

In earlier studies, isotretinoin has shown potential for increasing sperm production in men. Research suggests it can boost sperm count and improve motility. One study found that isotretinoin could enhance semen volume and total sperm count. However, effects vary among individuals, and further research is necessary to fully understand isotretinoin's impact on male fertility.

Human chorionic gonadotropin (hCG), a hormone treatment, is often used and generally well-tolerated. The FDA has approved it for certain types of male infertility. Most men tolerate hCG well, but side effects can occur, such as mild reactions at the injection site or temporary hormone level changes.

Researchers are excited about these treatments for male infertility because they explore new possibilities beyond the typical hormonal therapies like testosterone and clomiphene citrate. Isotretinoin, primarily known for treating acne, is being investigated for its potential to enhance sperm production, which is a novel approach. In contrast, while hCG is already used to stimulate testosterone production, this trial explores a specific dosing regimen that could optimize its effectiveness. Both treatments offer fresh perspectives on improving male fertility, potentially broadening the arsenal of options available for patients.

This trial will compare the effectiveness of isotretinoin and hCG for male infertility. Research has shown that isotretinoin, administered to participants in one arm of this trial, may assist men with little or no sperm in their semen. In one study, 40% of men had active sperm after taking isotretinoin. Another study found that sperm count increased by about 1.3 million per milliliter, and sperm movement improved by 3%. Isotretinoin might be the first pill to naturally boost sperm production in men with serious issues. Meanwhile, participants in the other arm will receive hCG, a common treatment that increases testosterone and sperm production in some infertility cases. Both treatments could benefit men facing fertility challenges.¹³⁶⁷⁸