The criteria of litter size in relation to growth of the rat. II. Maternal capacity and stimulation.
D000818:Animals; D001835:Body Weight; D005260:Female; D007774:Lactation; D008098:Litter Size; D008425:Maternal Behavior; D011247:Pregnancy; D051381:Rats / Q000254:growth & development*; D013997:Time Factors