Male Contraceptive Vaccine

  By taking a shot a week for three consecutive weeks, a man's sperm can be devitalized using an antibody that covers the sperm's surface, rendering sperm unable to fertilize eggs. The joint research by Chinese, American and French experts is expected to be put into production within three years.

  Preliminary experiments on mice and monkeys have proven successful. But three years of large quantity animal and human tests are required to observe toxicological effects. Once used in clinical treatment, one shot a week for three weeks will prevent pregnancies for up to half a year.