title: [Studies on the pheromonal pregnancy block in the mice. I. Strain differences of mice in pheromonal pregnancy block (author's transl)].
abstract: Strain differences of mice in the "Bruce effect" were examined among five inbred strains ; C3H, C57BL/6, BALB/c, CBA and DDY. For mating, 3 virgin adult females were caged together with an adult male at 8 approximately 20 weeks of age, and checked daily for copulation for a maximum of 10 days. The females were removed from the male when the vaginal plug was found, and housed with strange or alien males for 8 or 15 days. The "Bruce effect" was evident in C3H, BALB/c, CBA and DDY strains having high percentages of blocked pregnancies on alien males. In contrast, C57BL/6 strain showed no such effect. Based on these findings, it was concluded that "Bruce effect" caused by alien male pheromone showed strain differences among different strains of mice.
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D051379:Mice / Q000502:physiology*; D008815:Mice, Inbred Strains / Q000502:physiology; D010675:Pheromones / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal; D013045:Species Specificity
chemical_list: D010675:Pheromones