The influence of birth order, maternal age on sex ratio at birth in Greater Bombay.
"The present paper aims to find out the influence of birth order and maternal age on sex ratio at birth in Greater Bombay [India] by considering 1.5 million births during the period 1970-78.  The relationship sex ratio at birth has [with] birth order and maternal age follows a quadratic model."  The percentage variation explained by a linear model is less than that explained by the quadratic model.
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D000367:Age Factors; D001208:Asia; D001722:Birth Order; D003710:Demography; D003906:Developing Countries; D005191:Family Characteristics; D005195:Family Relations; D007194:India; D008423:Maternal Age; D008962:Models, Theoretical; D010290:Parents; D011153:Population; D011154:Population Characteristics; D012106:Research; D017678:Sex Distribution; D012737:Sex Factors; D012744:Sex Ratio
Age Factors; Asia; Birth Order; Demographic Factors; Developing Countries; Family And Household; Family Characteristics; Family Relationships; India; Maternal Age; Mathematical Model; Models, Theoretical; Parental Age; Population; Population Characteristics; Research Methodology; Sex Distribution; Sex Factors; Sex Ratio; Southern Asia