Hormones used in breast cancer treatment could affect disease progression, outcomes i

[News]

Recently, researchers have discovered that the hormone progesterone, an ingredient in contraceptives and menopausal hormone replacement therapies, might stimulate the growth of breast cancer cells that are resistant to anti-estrogen therapy and chemotherapy.

More... (http://www.news-medical.net/news/20150622/Hormones-used-in-breast-cancer-treatment-could-affect-disease-progression-outcomes-in-some-patients.aspx)