Abstract
Tetanus Toxoid loaded biodegradable microspheres (MTT) (poly (DL-Lactide-co-Glycolide) were administered intramuscularly to pregnant Wistar rats from Days 6 to 15 of gestation, at 1, 5 and 10-times the human equivalent dose of TT. Developmental defects in relation to soft tissues and skeleton, weight and sex of live pups and early fetal deaths from treated and control rats were analysed. The findings in treatment groups were comparable to those in the controls. These observations show that MTT was safe for pregnant rats and developing pups.
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