Factors affecting birth weight of children: mothers with pre-eclampsia (OR=25.00; p<0.001), mothers with low prepregnancy body mass index (OR=3.93; p=0.05), mothers with low gestational weight gain (OR=8.04; p<0.001), mothers exposed to tobacco (OR=6.00; p=0.01), children with birth defects (OR=11.51; p<0.001), multiple pregnancies (OR=11.71; p<0.001), early neonatal sepsis (OR=4.65; p=0.04).