title: Naturally occurring superfoetation in the rat.
abstract: A case of superfoetation in the rat is described and an estimate of the incidence of naturally occurring cases in a colony of Porton strain Wistar (LAC:P) rats rats is made (0-09-0-27% of litters born).
mesh_terms: D000818:Animals; D005260:Female; D007743:Labor, Obstetric; D011247:Pregnancy; D051381:Rats / Q000502:physiology*; D013476:Superfetation