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Injectable Testosterone May Provide Effective Male Contraception

Date:
May 5, 2009
Source:
The Endocrine Society
Summary:
Researchers may have found a method for male contraception that is effective, reversible and without serious short-term adverse effects, according to a new study.

Researchers in China may have found a method for male contraception that is effective, reversible and without serious short-term adverse effects, according to a new study.

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"For couples who can not, or prefer not to use only female-oriented contraception, options have been limited to vasectomy, condom and withdrawal," said Dr. Yi-Qun Gu, MD, of the National Research Institute for Family Planning in Beijing, China. "Our study shows a male hormonal contraceptive regimen may be a potential, novel and workable alternative."

Dr. Gu said this study is the largest multi-center, male hormonal contraceptive efficacy clinical trial of an androgen preparation in the world. Participants included 1,045 healthy fertile Chinese men aged 20-45 years. Each participant had fathered at least one child within the two years before the study and had a normal medical history. Their female partners were between 18 and 38 years of age and had normal reproductive function.

Males were injected monthly with 500 mg of a formulation of testosterone undecanoate (TU) in tea seed oil for thirty months. Results showed a cumulative contraceptive failure (pregnancy) rate of 1.1 per 100 men in the 24-month efficacy phase. No serious adverse events were reported and reproductive function returned to the normal fertile reference range in all but two participants.

"Despite the present encouraging results, the long-term safety of this hormonal male contraceptive regimen requires more extensive testing with a focus on cardiovascular, prostate and behavioral safety," said Dr. Gu.


Story Source:

The above story is based on materials provided by The Endocrine Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Gu et al. Multicenter Contraceptive Efficacy Trial of Injectable Testosterone Undecanoate in Chinese Men. Journal of Clinical Endocrinology & Metabolism, June 2009; DOI: 10.1210/jc.2008-1846

Cite This Page:

The Endocrine Society. "Injectable Testosterone May Provide Effective Male Contraception." ScienceDaily. ScienceDaily, 5 May 2009. <www.sciencedaily.com/releases/2009/05/090504094256.htm>.
The Endocrine Society. (2009, May 5). Injectable Testosterone May Provide Effective Male Contraception. ScienceDaily. Retrieved December 17, 2014 from www.sciencedaily.com/releases/2009/05/090504094256.htm
The Endocrine Society. "Injectable Testosterone May Provide Effective Male Contraception." ScienceDaily. www.sciencedaily.com/releases/2009/05/090504094256.htm (accessed December 17, 2014).

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