Abstract
Two groups of 63-day-old female Wistar rats were fed a folic acid deficient diet, based on 20% of vitamin-free casein and containing 1% of succinylsulfathiazole, for 5 weeks (group A) and 9 weeks (group B) before being bred, and the same diet was continued through pregnancy and lactation. Three out of eleven (21.3%) and three out of seven (42.9%) rats in groups A and B, respectively, resorbed completely, while no control rat resorbed. No pups from group B survived to weaning. Both groups (A and B) showed depressed feed consumption (although the effect in group A rats was small) and weight gains and increased formiminoglutamic acid excretion in the urine during gestation, and low serum folic acid by the end of lactation. A study of blood components in group A rats revealed leucopenia, granulocytopenia, and increased reticulocyte count. While no congenital deformities were observed in pups from deficient dams, group A and group B dams in contrast to controls produced smaller sized litters with lower birth weights and poor survival rate. Surviving pups from group A dams had decreased weaning weights with significantly lower brain weights and brain DNA per gram of tissue.
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