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Abstract

Title: Maternal, prenatal and perinatal characteristics and first trimester maternal serum hormone concentrations.
Author: Troisi R,Hoover RN,Thadhani R,Hsieh CC,Sluss P,Ballard-Barbash R,Potischman N
Journal: Br J Cancer 99(7):1161-4
Year: 2008
Month: October

Abstract: In uncomplicated pregnancies, first trimester androgen, oestrogen and prolactin concentrations were higher in nulliparous (n=160) than parous (n=260) mothers. Androgens and estrogens were higher in younger than older mothers. These data are consistent with elevated hormone concentrations mediating the breast cancer protection from a first pregnancy and pregnancies occurring at younger ages.