Originally posted by Emily-Fisher
You guys are dirty. What's estrogen?
es·tro·gen also oes·tro·gen
Any of several steroid hormones produced chiefly by the ovaries and responsible for promoting estrus and the development and maintenance of female secondary sex characteristics.
Basicly it's what starts @ puberty and causes a sore chest, starts the menstrual cycle and allows you to appreciate films like titanic and steel magnolias.