Regional Distribution of Birth Rates of Twins in China

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.