Scientists develop injection for long-lasting contraceptive implant

The approach involves injecting micro-crystals of a synthetic version of the hormone progesterone contained in a solvent that does not mix well with water. File picture

Researchers are developing an injection that creates a contraceptive implant in the body using an approach that could herald a new way of delivering drugs over long periods of time.

Current contraceptive implants last for years, meaning women do not have to take a pill every day, but the devices must be fitted by a trained professional via a small surgical procedure.