Mechanical stimulation of mammary gland development in virgin and pregnant rats.
D000818:Animals; D005260:Female; D008321:Mammary Glands, Animal / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*; D010812:Physical Stimulation / Q000295:instrumentation; D011247:Pregnancy; D011270:Pregnancy, Animal; D051381:Rats; D012107:Research Design