Handedness of parents and sex of progeny.
The sex ratio (proportion of males) of offspring of left-handed people seems to be lower than that of offspring of right-handed people. This finding is related to hypotheses of the author and of Geschwind. The finding suggests further research which would test the hypotheses jointly.
D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D010290:Parents; D012744:Sex Ratio