@vicgrinberg "Estrogen Matters" went through in detail the statistical and methodological mistakes in the US study of menopausal HRT that were misinterpreted as raising the risk of cancer. The only real risk is for strokes if you are menopausal for several years and then start HRT - something about the plaques coming loose when the arteries re-soften. I can't remember the exact protocol for which types of hormones but it is all in there