The Ava bracelet, which is already being used by thousands of women in Britain, is close to launching a contraception setting which will show when fertility is high and warn against intercourse.
Ava is in the late stages of research before rolling out the new setting on the £249 (R4424) bracelet, which looks like a Fitbit-style fitness tracker.
The move is likely to be welcomed by women who often forget to take their pill. It is claimed the bracelet and its app help users keep an accurate track of their menstrual cycle by monitoring nine “biomarkers”, including skin temperature, breathing, heart rate and “perfusion” - blood supply around the body. The makers say the bracelet can detect an average of 5.3 fertile days per cycle with 89% accuracy.
The Swiss-based company decided to launch the contraceptive feature following feedback from women who admitted they were already using the device to avoid pregnancy.