Heavy metals and its salt form are important group of pollutants found in the environment.Heavy metals in less quantity act as nutrition to the body if it exceeds that it becomes fatal.During pregnancy it is very much necessary to concentrate on diet.Because good diet is necessary to maintain good health of body as well as mother.These heavy metal mainly enters to the body through ingestion ,may be through water and food.In this review adverse effects caused by mercury,lead,arsenic,cadmium is discussed. This review paper provide an view on toxic effects on pregnant women and newly born baby by heavy metals.It is used to get awareness regarding heavy metal poisoning. Key words:Heavy metal poisoning,chelation therapy,reproductive system.