Tran Thi Nguyet Nga showed that birth weight less than 2500 g (OR=3.2), early weaning (OR=4.3) were related to deficient and insufficient Vitamin D Maternal nutritent supplementation, sun exposure ≥ 30 minutes / day, acute diarrhea, acute respiratory infections, lipid diet, Vitamin A, Zn, Magnesium were not significantly associated with deficient and insufficient Vitamin.