Kuhr M D
Dev Med Child Neurol. 1977 Oct;19(5):589-92.
The prevalence of mid-cycle abstinence at the time of conception of infants born with neural-tube defects was found to be only 6-7 per cent (8/119) compared with that of 9-8 per cent (32/325) at the time of conception of non-affected siblings. This is suggestive evidence against mid-cycle abstinence--and, by inference, over-ripeness--as an important possible cause of neural-tube defects.
研究发现，患有神经管缺陷的婴儿在受孕时处于月经周期中期禁欲的比例仅为6%-7%（8/119），而其未受影响的兄弟姐妹在受孕时处于月经周期中期禁欲的比例为9%-8%（32/325）。这是反对将月经周期中期禁欲——以及由此推断的卵子过度成熟——作为神经管缺陷一个重要可能原因的暗示性证据。
