A side-effects-free male contraceptive pill is being developed which can be taken as a one-off dose just before a date, according to researchers at King's College, London.
This kind of hormone-free tablet could prevent a man from being able to impregnate a woman, but within a few hours his fertility would return to normal.
"If the man was taking the pill over a period of several months and decided to come off it, we would expect his fertility to return just as quickly as if he had taken it on a one-off basis," said Dr Christopher Smith, a researcher from King's College.
The results of trials on laboratory animals, published in the Nature Medicine journal, had shown the contraceptive effect is reversible, with no apparent long-term side effects. It is hoped human trials will start shortly and the pill is on the market within the next five years. Annual worldwide sales of the female pill are worth 41 billion U.S. dollars a year.
Story was seen here.