title: Comparative studies of litters obtained from Long-Evans and Sprague-Dawley rat stocks.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001724:Birth Weight; D001835:Body Weight; D005260:Female; D005298:Fertility; D007774:Lactation; D011247:Pregnancy; D051381:Rats / Q000254:growth & development*; D013045:Species Specificity; D013997:Time Factors