Male Contraception.

Area of Science:

• Reproductive Health
• Public Health
• Pharmacology

Background:

• Unintended pregnancy remains a global health issue, with limited male contraceptive choices like condoms and vasectomy.
• Current male options have drawbacks: condoms have high failure rates, and vasectomy is not reliably reversible.
• There is a significant global demand for new, effective, and reversible male contraceptive methods.

Purpose of the Study:

• To review the progress and challenges in developing novel male contraceptive methods.
• To assess the potential of hormonal and nonhormonal male contraceptives.
• To highlight the impact of male contraceptives on reproductive health equity.

Main Methods:

• Review of clinical trials and studies on hormonal male contraception (androgen plus progestin formulations).
• Examination of various drug delivery systems: oral, transdermal, subdermal, and injectable.
• Analysis of ongoing research into nonhormonal, potentially reversible vaso-occlusive methods.

Main Results:

• Hormonal male contraceptives have demonstrated short-term safety and reversibility.
• Efficacy trials show hormonal methods are more effective than condoms.
• Common side effects include weight gain, acne, mood changes, and altered libido; nonhormonal methods are less advanced.

Conclusions:

• Hormonal male contraceptives, particularly androgen plus progestin combinations, hold promise for reversible contraception.
• Barriers to development include funding, side effect concerns, and unproven effectiveness of nonhormonal methods.
• Availability of male contraceptives could significantly reduce unintended pregnancies and advance reproductive justice.