Rehan N, Tafida D S
Br J Obstet Gynaecol. 1980 Nov;87(11):997-1004. doi: 10.1111/j.1471-0528.1980.tb04464.x.
The incidence of multiple births was studied using the maternity records of 5750 Hausa women living in the savannah zone of Nigeria. There were 40 twins and 2 triplets/1000 births. Twenty six per cent of twins were monozygous. The incidence of multiple births, which was about five times higher than that observed in any western population, was significantly lower than that of other ethnic groups, who live in the hot and humid climate of the southern pat of country. The incidence of multiple births was related to maternal age but did not bear any association to the climate or prevalence of malaria.
利用居住在尼日利亚萨凡纳地区的5750名豪萨族妇女的生育记录，对多胞胎的发生率进行了研究。每1000例分娩中有40例双胞胎和2例三胞胎。26%的双胞胎为单卵双胞胎。多胞胎的发生率约为任何西方人群中观察到的发生率的五倍，但显著低于该国南部炎热潮湿气候地区的其他种族群体。多胞胎的发生率与产妇年龄有关，但与气候或疟疾流行率无关。
