The sex ratio in anencephaly

W H James
1979 Journal of Medical Genetics  
A review of the data supports the suggestion of Knox (1974) that the sex ratio and incidence of anencephalics vary together within populations, as they are known to do between populations. There seems some doubt, though, whether Knox was correct in hypothesising that the sex ratio of anencephalics varies with their incidence in relation to the dizygotic twinning rate.
doi:10.1136/jmg.16.2.129 fatcat:kexglnhm2vbvzdgp4gtl2krhna