A POSSIBLE EXPLANATION OF THE EXCESSIVE BROTHER-TO-SISTER RATIOS REPORTED IN SIBLINGS OF MALE HOMOSEXUALS.
D005190:Family; D005260:Female; D006716:Homosexuality; D018451:Homosexuality, Male; D006801:Humans; D007802:Language; D008297:Male; D035781:Siblings; D013223:Statistics as Topic
FAMILY; HOMOSEXUALITY; STATISTICS