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Table 5 Sex ratio by parity and sex composition of previous children

From: The effect of children on female labor force participation in urban Iran

Birth order Previous children Observations Sex ratio 95% confidence interval
    Lower bound Upper bound
First   132,599 1.055 1.044 1.066
Second girl 51,689 1.032 1.015 1.050
  boy 53,920 1.049 1.031 1.066
Third girl, girl 17,356 1.082 1.051 1.115
  girl, boy 33,703 1.067 1.044 1.090
  boy, boy 17,685 1.080 1.048 1.112