a With adjustment for age at childbirth, year of childbirth, urbanization, ethnicity, diabetes mellitus, maternal infection, epilepsy, psychiatric diseases, history of abortion, history of preterm birth, pregnancy by IVF, nulliparous women, pre-eclampsia, gestational diabetes, placental abruption, placenta or vasa previa, congenital diseases, intrauterine growth restriction, macrosomia, stillbirth, and fetal distress. b Women with induction of labor were excluded from analysis. c To adjust for multiple testing, we considered a P value of <0.008 statistically significant. d To prevent revealing data, numbers of less than 5 are grouped together, conform the rules of CBS. *Statistically significant. APGAR, appearance, pulse, grimace, activity and respiration; CBS, Statistics Netherlands; CI, confidence interval; CIN, cervical intraepithelial neoplasia; IVF, in vitro fertilization; NICU, neonatal intensive care unit. (DOCX)