The authors proved relationship between congenital abnormalities in children and influence of chemical factors (methanol and formaldehyde production) on the parents. Higher risk of congenital abnormalities was seen: PR = 5.6 (chi2 = 3.54; p = 0.00001), EF = 0.95. These disorders could be connected with work conditions--exceeded MAC for methanol 3.9-fold, that for formaldehyde--2.4-fold.