Breast cancer risk from progestogen-only contraceptives ‘on par’ with combined pill

The 'significant but comparatively small' risk falls to zero after 10 years after last use

Progestogen-only contraceptives confer a similar increased risk of breast cancer as combined oral contraceptives, according to UK and Australian researchers.

Their study involving nearly 28,000 women suggests all progestogen-only preparations — including injectables and IUDs — are associated with a “significant but comparatively small” 23-32% elevated likelihood of incident invasive breast cancer.