Background The adverse pregnancy outcomes caused by teenage pregnancy are major public health problems with significant social impact. While China is the most populous country in the world, and 8.5% of the women aged 10-50 years are adolescent women, we aimed to analyze the adverse maternal and perinatal outcomes of the adolescent pregnancy in Hebei Province, China.Methods There were 238,598 singleton pregnant women aged 10-34 years from years, aged 25-34 years). We compared the risk of adverse pregnancy outcomes using univariate and multivariate logistic regression. We also made a stratified analysis of nulliparous and multiparous adolescent pregnancy.Results Compared with women aged 20-34 years, women aged 10-19 years had lower risk of cesarean delivery [adjusted risk ratio (aRR): 0.75, 95% confidence interval (CI): 0.70-0.80], gestational diabetes mellitus (GDM) (aRR: 0.55, 95%CI: 0.41-0.73). Women aged 10-19 years had higher risk of preterm delivery (aRR: 1.76, 95%CI: 1.54-2.01), small for gestational age (SGA) (aRR:1.19, 95%CI: 1.08-1.30), stillbirth (aRR: 2.58, 95%CI: 1.83-3.62), neonatal death (aRR: 2.63, 95%CI:1.60-4.32). The adolescent women aged 10-17 years had significantly higher risk of stillbirth (aRR: 5.69, 95%CI: 3.36-9.65) and neonatal death (aRR: 7.57, 95%CI: 3.74-15.33) compared with the women aged 25-34 years. Younger adults (20-24 years) also had higher risks of preterm delivery (aRR: 1.26, 95%CI: 1.20-1.32), stillbirth (aRR: 1.45, 95%CI: 1.23-1.72), and neonatal death (aRR: 1.51, 95%CI: 1.21-1.90) compared with women aged 25-34 years. The structural equation model showed that preterm delivery and cesarean delivery had an indirect effect on neonatal death in adolescent pregnancy.
ConclusionsThe adolescent pregnancy was related to adverse perinatal (fetal and neonatal) outcomes, such as preterm delivery, stillbirth and neonatal death, especially in younger adolescent