Is progesterone a neutral or protective factor for breast cancer? | Nature Reviews Cancer - Progestrone breast
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Progesterone is an ovarian steroid hormone that is essential for normal breast development during puberty and in preparation for lactation and breastfeeding. The Women’s Health Initiative (WHI) randomized trials of menopausal hormone therapy have provided insights that have dramatically changed clinical practice and led to reduced breast cancer incidence at a population level. The contrast between effects of E + P therapy vs estrogen.