The effects of intrauterine position on competition and behavior in the mouse.

The purpose of the present study was to examine the effect of intrauterine position on: (1) competition for limited food resources when the animals were previously deprived of food; (2) social preference for a male during various phases of the estrous cycle; and (3) social and sexual behavior when the animals were provided with like-treated females or receptive females, respectively. Females developing in utero between two males (2M females) and females developing between two females (0M females) were different on only one measure recorded during the competition for limited food, i.e.