Birth Order and Sibling Sex Ratio in Androphilic Males and Gynephilic Females Diagnosed with Gender Dysphoria from Iran

Abstract

In contrast to the well-established fraternal birth order effect for males, the possible sororal birth order effect for females needs to be examined with additional samples. Khorashad BS, Zucker KJ, Talaei A. Birth Order and Sibling Sex Ratio in Androphilic Males and Gynephilic Females Diagnosed With Gender Dysphoria from Iran. J Sex Med 2020;17:1195-1202.