James W H
Hum Hered. 1983;33(2):109-11. doi: 10.1159/000153359.
I have previously suggested that the sex ratios of multiple births registered in Japan are biased. Data published by Imaizumi[1982a, b] are consistent with the suggestion that this alleged bias diminished during the two decades preceding 1974. If true, this would provide additional evidence for my claim that the sex ratio of monozygotic twins is low.
我之前曾指出，日本登记的多胞胎性别比存在偏差。今泉[1982a，b]公布的数据与以下观点一致：这种所谓的偏差在1974年之前的二十年里有所减少。如果这是真的，这将为我的观点提供更多证据，即单卵双胞胎的性别比很低。
