A New Male Contraceptive? Not So Fast…

Currently, women have a multitude of available options for birth control including oral contraceptives, diaphragms, IUDs, and tubal ligation.   For men, choices are limited to condoms and vasectomy.   A group in Germany is exploring a third option:  injectable medication to that reduces sperm production.

The team led by Dr. Hermann Behre of Martin Luther University of Halle-Wittenberg, Germany, reported on injection therapy with both long acting testosterone and progestin in an effort to drive down sperm production in men and allow effective contraception.   Men received injections every 8 weeks over the course of a year. Out of 266 men involved in the trial,  4 unplanned pregnancies were initiated.     Given when during the course of the year pregnancies were initiated, failure rate was calculated to be about 7.5 %  which compares favorably to oral contraceptives for women.    Furthermore, when examining sperm production, examination revealed sperm concentration dropped to less than 1 Million per Ml in 86% of men after 24 weeks. 

Side Effects

However, there were side effects of the medication such as mood disorder including hostility and aggression as well as  acne, injection site pain, muscle pain.   A total of 1491 adverse events  were reported during the study and 20 men did drop out of the study due to side effects.   In fact the study was stopped earlier than planned due to side effects.

There are also theoretical concerns.    Use of testosterone to drive down sperm production is sometimes so effective that sperm production may not rebound after it is discontinued.    Average time to recovery of sperm production in this study was 24 weeks, but 8 participants  failed to have full recovery after 52 weeks.

Also, use of progestin in men is like venturing out in fairly uncharted waters.   Progestin is a form of Progesterone which acts as an antagonistic hormone to estrogen in women.   In men, increasing this hormone to higher than normal levels may have additional risks.  

Non Hormonal Medications

Looking to the future, other non hormonal medications are being developed which may attack sperm function in order to enable contraception.   Until then, for men, it’s condoms, vasectomy or abstinence.

You Might Also Enjoy...

Can You Prevent Kidney Stones?

Kidney stones are common — and painful. Once you have one kidney stone, your risk of developing more increases. The good news is that there’s a lot you can do to lower your risk of kidney stone formation. Get our prevention tips here.

Recovering From a Vasectomy Reversal

Regretting your vasectomy? A vasectomy reversal could be the solution you’re seeking. It’s an outpatient procedure that can be up to 90% effective. Find out more about it and what to expect during recovery.

What Every Man Should Know About His Prostate

The prostate is a small gland in the male reproductive system. From how it functions to the importance of regular prostate screenings, find out what you need to know about your prostate health here.

A Closer Look at Testosterone

Testosterone is an important male hormone. It influences functions from sex drive and fertility to body weight and mood — but low testosterone is a common problem for many men. Learn the signs of low testosterone and what you can do about it.

The Importance of Prostate Cancer Screenings

Prostate cancer is common, especially among men over age 50. Early stage cancer is the most treatable, but without early symptoms, how is prostate cancer identified? Learn about the importance of regular prostate cancer screenings.

What to Expect From a Vasectomy Reversal

A vasectomy is considered a permanent method of male birth control. But if you’ve had a vasectomy, does that mean you can’t ever father a child? If your family planning goals have changed, vasectomy reversal could be right for you.