Does progesterone cause cancer?

Many people, including regulatory agencies and members of the medical community, make the mistake of thinking that progesterone and synthetic progestins have the same potential for adverse effects. This erroneous thinking is the root of women’s concerns that progesterone causes cancer. read more

There's a lot of confusion out there when it comes to the topic of progesterone and breast cancer. About 70% of breast cancers are ER+ (estrogen receptor-positive), and most of these breast cancers (about 87%) are also PR+ (progesterone receptor-positive). Hormone receptor status has long been a main factor in considering breast cancer treatment. read more