Pregnancy outcomes in bridal pregnancy and post-marital pregnancy, according to maternal age groups.

PTB, preterm birth; VPTB, very preterm birth; LBW, low birth weight; VLBW, very low birth weight; OR, odds ratio.1Bridal pregnancy is defined as childbirth before 5 months of marriage.2Post-marital pregnancy is defined as childbirth between 10 and 24 months of marriage.3Calculated using the χ2 test.4Adjusted for birthplace, sex, paternal age, paternal and maternal employment, and paternal and maternal education level.