The effects of intromission frequency on successful pregnancy in the female rat.
D000818:Animals; D003307:Copulation; D010064:Embryo Implantation; D005260:Female; D005306:Fertilization; D007030:Hypothalamo-Hypophyseal System / Q000502:physiology; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D051381:Rats