Reproductive Toxicology is a study of the adverse effect of an exogenous agent on embryo, fetus, neonate and pre-pubertal mammal and the adult reproductive and neuroendocrine systems. Reproductive Toxicity includes an effect on male fertility, female fertility, parturition, and lactation. Side effect of the reproductive toxicity in females areReduced fertility, Delayed Puberty, Neurobehavioral problems, Premature birth, Childhood cancer, Birth defects, Spontaneous abortion, Menstrual disorders. Aims of the Reproductive toxicology are to predict the adverse effects of chemicals and medicines on the ability of man to reproduce by assessing effects in animals. The substance that causes the developmental toxicity from developing stage to birth is called teratogens.