In rodents, steroid hormones are thought to be transported between adjacent fetuses, and
male or female fetuses that develop in utero between female fetuses may have higher serum
levels of estradiol, and lower serum levels of testosterone, relative to siblings of the same
sex that develop between two male fetuses. The consequence in the variation of postnatal
growth, development, and function in the intrauterine position, using various parameters
such as anogenital distance, preputial separation and vaginal opening, estrous cycle …