Maternal age, parity, fetal sex and adverse fetal outcomes

Clinical records comprised maternal age, maternal body weight before pregnancy, number of previous deliveries, maternal weight before conception, pregnancy weight gain, duration of pregnancy, mode of delivery, birth weight, birth length and sex of the newborn. We studied the associations of these independent variables with following adverse binary outcomes: preterm delivery (delivery before 37 weeks of gestation; yes/no), low birth weight (birth weight < 2500g; yes/no), macrosomia (birth weight > 4500g; yes/no), and caesarean delivery (yes/no).