All types of hormonal contraceptives carry a small increased risk of breast cancer, according to research establishing a link with progestogen pills for the first time.
The use of progestogen is associated with a 20-30% higher risk of breast cancer, data analysis by University of Oxford researchers has established. This builds on previous work showing that use of the combined contraceptive pill, which contains oestrogen and progestogen, is associated with a small increase in the risk of developing breast cancer that declines after stopping taking it.
