Increased birth rank of homosexual males: disentangling the older brother effect and sexual antagonism hypothesis
M. Raymond, D. Turek, V. Durand, S. Nila, B. Suryobroto, J. Vadez, J. Barthes, M. Apostolou, P.-A. Crochet
The paper disentangles the older brother effect and sexual antagonism hypothesis by analyzing birth rank data to determine their roles in male homosexual orientation.
bioRxiv · Feb 22, 2022Evolutionary Biology