A, B, Effect of bilateral Me lesions (Ant-Me, Post-Me, AP-Me) on the preference of ovariectomized, estradiol and progesterone-primed female mice to investigate urinary odors from castrated male versus testes-intact male mice presented simultaneously in the subjects' home cage. A, Subjects' preference for volatile urinary odors presented outside the home cage (Non-contact) and B, subjects' preference for volatile + non-volatile urinary odors presented inside the home cage (Nasal Contact). Data are represented as the average (± SEM) time spent sniffing intact male urine minus the time spent sniffing castrated male urine for each group. Different letters above columns in each group indicate statistically significant differences from each other (1-way ANOVA followed by Fisher LSD test). The number of subjects in each group is given in parentheses.