highly significantP = 0.0054
The T levels of female fetuses were not associated with their father’s proportion in the litter (N = 47, F 1,44.68 = 0.003, P = 0.95), while the association for male fetuses was highly significant (N = 44, F 1,29.74 = 9.02, P = 0.0054) (Fig. 1 a).