There is currently no convenient, reliable, and reversible method for men. As an issue of social justice and equality, men deserve more options.
There are some interesting potential social consequences and advantages that might come from a new male method, e.g., a male pill. Men would be more empowered to control their own fertility and might feel more responsible for pregnancies.
In addition, while many reversible female methods are highly effective, they all have side effects. The best way for women to avoid the side effects of female contraceptive methods might be for their male partners to have some new choices. If a woman has problems with a particular method, her partner might be able to help out, while she considers switching to another method. Some men might take primary responsibility for contraception.
From a social/political point of view, a male contraceptive might be more acceptable to some people because it would un-ambiguously eliminate concerns about whether a particular type of family planning acts before or after conception. Enforcement of child support obligations might be better accepted because men would have had a way to avoid fatherhood.
Researchers have worked for many years to develop and commercialize a male hormonal contraceptive, but without success. A number of different types of hormones and hormone combinations have been tried, and researchers have found that a combination of an androgen and a progestin is the most effective approach. But the research is inevitably slow.
It typically takes 10 to 20 weeks for a male hormonal method to suppress fertility, because sperm production is a 10 week process. Even if one halts production of new sperm, the sperm that are already in the pipeline will reach maturity and maintain a man’s fertility until they are exhausted. While testosterone is effective at reducing sperm counts to a level that will prevent pregnancies, there is concern about side effects, such as acne or changes in mood.