James W H
J Med Genet. 1979 Oct;16(5):384-8. doi: 10.1136/jmg.16.5.384.
Published reports on the sex ratio of spina bifida have been reviewed. With one exception, there seems to be no evidence of variation in the sex ratio of spina bifida. In particular, unlike anencephaly, the sex ratio of spina bifida seems to be unrelated to the prevalence of the malformation: this (M/(M+F)) is of the order of 0.44 in respect of all spina bifida births (liveborn and stillborn). The sex ratio of spina bifida in Negroes does not seem to differ from that in whites (though the data on this point are not numerous). The exception noted above concerns spina bifida occurrring in twins: these cases are disproportionately often female. The point stands in need of explanation.
已对有关脊柱裂性别比例的已发表报告进行了综述。除一个例外情况外,似乎没有证据表明脊柱裂的性别比例存在差异。特别是,与无脑儿不同,脊柱裂的性别比例似乎与畸形的患病率无关:就所有脊柱裂出生(活产和死产)而言,其(男性/(男性+女性))约为0.44。黑人中脊柱裂的性别比例似乎与白人没有差异(尽管关于这一点的数据不多)。上述例外情况涉及双胞胎中的脊柱裂:这些病例中女性比例过高。这一点有待解释。