Parturient mice: effect of environment on labor.
More first-born pups and greater numbers of pups were born in a familiar cage having a covered nesting box than in a glass bowl, when pregnant mice at term were alternated between contrasting environments. Current theories emphasize the influence on labor of mechanical and hormonal factors; these data suggest that environmental factors also may play a role.
D000818:Animals; D001522:Behavior, Animal; D004777:Environment; D005260:Female; D007743:Labor, Obstetric; D051379:Mice; D011247:Pregnancy; D011270:Pregnancy, Animal