title: Production of timed pregnant mice by utilization of the Whitten effect and a simple cage system.
abstract: Pregnant female mice with an impregnation time of 4 hours were achieved by utilizing the Whitten effect and a simple caging system. The cage consisted of a mobile wire-lattice which divided a plastic cage into two compartments to separate the females from the male but still allowed some contact. A synchronization time of 72 hours succeeded in an average copulation rate of 28.1 +/- 5.39% when the procedure was conducted in the forenoon.
mesh_terms: D000818:Animals; D003307:Copulation; D005260:Female; D006799:Housing, Animal; D008297:Male; D051379:Mice; D011247:Pregnancy; D011270:Pregnancy, Animal; D012724:Sex Attractants / Q000502:physiology; D013997:Time Factors
chemical_list: D012724:Sex Attractants