The twinning incidence of Nigeria.
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.
D044383:Black People; D004032:Diet; D005247:Feeding Behavior; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D006801:Humans; D009549:Nigeria; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012959:Socioeconomic Factors; D013480:Superovulation; D014427:Twins; D014429:Twins, Dizygotic; D014675:Vegetables; D044465:White People
D005640:Follicle Stimulating Hormone