“…For example, the molecular mechanisms that steroid hormones use to affect cell differentiation, proliferation, and growth remain ill-defined. Furthermore, it is unknown if gonadal hormones, such as estradiol, act directly on cells or whether other hormone-stimulated autocrine and paracrine growth factors, such as IGF-I, IGF-II, TGF-oo, TGF-p, EGF, and FGF (Dickson and Lippman, 1988;McCarty and McCarty, 1991) are responsible for modulating cell function.…”