Firstborn children’s sex specific emotions and behaviors during mothers’ second pregnancy after implementation of the universal two-child policy in China

Abstract

The present cross-sectional study aimed to identify sex-specific characteristics and other factors for firstborn children’s emotions and behaviors during their mothers’ second pregnancy after the implementation of the two-child policy in China. Firstborn children aged 1.5–5 years old and their pregnant mothers were enrolled from two hospitals from March to September 2019 in our city. Mothers completed a self-designed questionnaire and Child Behavior Checklist during their routine prenatal examinations. Linear regression was used to explore potential factors influencing firstborn children’s behaviors and emotions towards their mother’s second pregnancy. A total of 880 firstborn children were included. There was no significant difference in internalizing/externalizing problem scores and prevalence between male and female firstborn children during their mothers’ second pregnancy. Children’s easy temperament, good parental relationship, and father’s authoritative and indulgent parenting styles were potential positive factors for both male and female firstborn children. Harmonious family environment, children’s age, father's accompaniment, and being informed by parents of the arrival of a sibling were only related to firstborn girls experiencing fewer emotional and behavioral problems. Mother’s education and seeking for firstborn children’s opinion about the new sibling were only related to firstborn boys experiencing fewer emotional and behavioral problems. There was no sex differences in internalizing/externalizing problems in firstborn children during their mother’s second pregnancy. Children’s temperament, family environment and fathers’ parenting styles were consistent influencing factors for both firstborn girls’ and boys’ emotions and behaviors.