Nylander P P
Acta Genet Med Gemellol (Roma). 1979;28(4):261-3. doi: 10.1017/s0001566000008746.
The dizygotic twinning rate in Western Nigeria is the highest on record (45-50 per mil maternities). It is suggested that, rather than to peculiarities in the population structure or to genetic factors, such a high incidence might be due to the presence in the diet of estrogen-like substances.
尼日利亚西部的双卵双胞胎出生率是有记录以来最高的（每千次分娩中有45 - 50例）。有人认为，如此高的发病率可能并非归因于人口结构的特殊性或遗传因素，而是由于饮食中存在类似雌激素的物质。
