Androgen and mineralocorticoid receptors are present on the germinal disc region in laying hens: Potential mediators of sex ratio adjustment in birds?

•Female birds bias offspring sex ratios due to environmental and social cues.•Hormones may act on the germinal disc (GD) region, affecting meiosis in ovarian follicles.•Receptors for testosterone and corticosterone were found on the GD region by Western blot.•Ovarian follicles contain receptors for these hormones just prior to ovulation.