Product known as Adam implanted in sperm ducts could offer a reversible alternative to condoms and vasectomies

An implantable, non-hormonal male contraceptive has been shown in trials to last for at least two years.

The contraceptive, known as Adam, is a water-soluble hydrogel that is implanted in the sperm ducts, preventing sperm from mixing with semen.

The company behind the product, Contraline, says the approach offers a reversible alternative to condoms and vasectomies, with the hydrogel designed to break down in the body after a set period of time, restoring fertility.