With no serious side effects, the jab is for the couples who want to share the contraception responsibility.

Couples, who are into a committed relationship, are more attracted towards this new discovery, as it is unable to give protection against any sexually-transmitted infections.

About 60 couples in Manchester and 20 in Edinburgh are taking part in the trials that will take almost a year to complete, as a part of a world-wide study. Professor Anderson, of the University of Edinburgh, opines that the jab will prove popular with both the sexes equally.

According to the trial, the men will be given two injections at their GP. It is effective in 99% cases, provided the sperm counts should return to normal immediately, once the injections are stopped. The injection comprises of testosterone, the male sex hormone and progesterone, (female sex hormone). It activates the brain into shutting off sperm production.

Professor Richard Anderson, who is heading one of two year-long trials, said,” A lot of women may think it’s time men took their turn”. Women, who used to consume pills, are a bit relieved, as, pills can cause breast cancer and blood clots.

Unplanned pregnancies can be avoided, only if men make regular trips to their GP. Jab is still five years away from the market.