https://www.sciencedaily.com/releases/2010/08/100810163506.htm
New research has found that progestins used in hormone replacement therapies to counteract the negative effects of estrogen on the uterus and reduce the risk...
breast cancer riskvariesamongdifferentprogestins
https://pubmed.ncbi.nlm.nih.gov/10393721/
The risk of developing endometrial cancer is increased after long-term use of estrogens without progestins and with cyclically added progestins. Continuously...
endometrial cancerriskfollowingestrogenreplacement