Androgen Receptor mRNA Expression is Positively Associated With Live Birth in Women Undergoing IVF Independently of the Type of Ovarian Response

AR is a steroid hormone receptor that regulates various genes' expression and affects cellular proliferation and differentiation. Androgens interact with AR, exert their paracrine action on granulosa cells and regulate gonadotropin synthesis, follicle development, oocyte maturation and corpus luteum function. Estrogens increase AR mRNA and testosterone binding site in uterine endometrium and leiomyoma. In human cancer cells, low estradiol increases AR levels, suggesting the estrogen/androgen ratio as a predictor of sex steroid response. AR mRNA expression is, also, regulated by progesterone. Although AR mRNA is expressed in the female reproductive tissues, its expression has never been studied in peripheral blood.