[Determining binding proteins of progesterones in patients with breast diseases].

We estimated serum levels of progesterone and the most important binding proteins in follicular and luteal phase at women without breast disease with biphasic or anovulatory cycle and female patients with benign or malignant breast diseases. There was an increase of the median value of acidic alpha-1-glycoprotein in the luteal phase at female patients with premenopausal breast cancer. The importance of serum levels of the bioavailable sexual steroids for the recognition of women with breast diseases is discussed.