* matched OR adjusted for maternal age, birth order, employment status, other drug uses and folic acid use during pregnancy in conditional logistic regression model.
** rectal/anal atresia/stenosis in 2 cases, esophageal atresia, renal agenesis, urethral valve stenosis (obstructive CA of urinary tract), primary microcephaly, congenital hydrocephaly, congenital cataract, congenital pyloric stenosis, atresia of bile duct, diaphragmatic CA, absence of vertebra, congenital cystic lung, ankyloglossia, giant kidney, torticollis in 1-1 case. Bold numbers show significant associations.