The introduction of the contraceptive pill in the 1960s was one of the most significant events in the history of human society. It still left the burden of birth control largely on women.

Now, however, things are changing. The demand for male contraceptives is on the rise. Last week, in a major breakthrough, the Indian Council of Medical Research (ICMR) finished clinical trials for the world's first injectable male contraceptive. The trial proved that it is safe and highly effective without any serious side effects.

But why have big pharmaceutical companies not paid enough attention to the research on male contraceptives for all these years?

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