Litter size and rate of offspring development in rodents.
D000818:Animals; D000831:Animals, Newborn; D001835:Body Weight; D005260:Female; D007668:Kidney / Q000033:anatomy & histology; D008099:Liver / Q000033:anatomy & histology; D008297:Male; D009929:Organ Size; D011247:Pregnancy; D051381:Rats / Q000254:growth & development; D012377:Rodentia / Q000254:growth & development*; D013154:Spleen / Q000033:anatomy & histology; D013950:Thymus Gland / Q000033:anatomy & histology