The light regimen and gestation length in the mouse.
D000818:Animals; D002940:Circadian Rhythm; D003624:Darkness; D005260:Female; D005865:Gestational Age; D007743:Labor, Obstetric; D008027:Light; D051379:Mice; D011247:Pregnancy; D011270:Pregnancy, Animal; D011272:Pregnancy, Multiple; D013997:Time Factors