[Can zinc deficiency in the mother be responsible for the occurrence of spina bifida aperta in the fetus?].

The occurrence in the fetus of closure defects of the neural tube and especially spina bifida aperta (SBA) has been related, by some authors, to nutritional deficiencies of the mother, in addition to well-known genetic factors: a folic acid deficiency and more recently a zinc deficiency have been evoked. The retrospective study of 23 couples mother/newborn selected from the presence of a SBA in the child, and 14 reference couples, shows that the mothers of children with SBA have a zinc blood level lower than that of the reference group; this result is confirmed by the alkaline phosphatases and zinc enzymes which are markedly decreased. Measurement of the incorporation of radioactive zinc in the skin fibroblasts shows, in case of SBA, in the mother, an increased incorporation rate, and in the newborn a decrease of that rate in relation to the reference group. We believe that the results of our study which confirm those from other authors, demonstrate that the administration of zinc during pregnancy is at least as important as the administration of folic acid to prevent recurrence of neurulation abnormalities.