中国不同卵性类型双生子出生率的地区分布

Regional Distribution of Birth Rates of Twins in China

目的 探讨中国不同卵性类型双生子出生率的地区分布特点。方法 选用全国各省市区 1 989年全年出生的双生子数据 ,用Weinberg差别法对双生子进行卵性分类。结果 MZ和DZ双生子出生率水平与地理区域性有关 ,且两者具有不同的地区分布模式。

Objective To explore the regional distribution features of the birth rates of different zygositic twins in China.Methods The birth records of twins in 1989 in China were divided into MZ and DZ twins by Weinberg's differential methods.Results The birth rates of MZ and DZ twins were interrelated to geographic areas,and had different reginal distribution models.Conclusion The birth rates of different zygositic twins are affected by regional factors in China.