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Proportions of male hpg mice displaying mounting behavior when paired with a steroid-primed female. Mice were treated with vehicle (VEH) or testosterone propionate (TP) on postnatal day 2, then either a cholesterol (chol) or a 2% estradiol (E) subcutaneous implant on day 35, and tested after 75 days of age. Three wild-type C3H mice were also tested (+/+).
