On sex ratios at birth and in childhood.
D001208:Asia; D002681:China; D003469:Culture; D003710:Demography; D003906:Developing Countries; D005006:Ethnicity; D005202:Asia, Eastern; D011153:Population; D011154:Population Characteristics; D017678:Sex Distribution; D012737:Sex Factors; D012744:Sex Ratio
Asia; China; Cultural Background; Demographic Factors; Developing Countries; Eastern Asia; Ethnic Groups; Population; Population Characteristics; Sex Distribution; Sex Factors; Sex Ratio