Genetics may reduce efficacy of hormonal contraception – study

Tentative link found between genetic variant and faster breakdown of hormone

An unintended pregnancy while using hormonal contraception may not always be down to the woman's mistake, according to research that suggests for some genetics could play a role.

Millions of women use hormonal contraceptives such as different types of the pill, contraceptive implants or hormone-releasing intrauterine systems (IUS) or vaginal rings. These devices release hormones to prevent the release of an egg, as well as triggering other changes in the body to prevent a pregnancy.