BACKGROUND & AIM :To study the teratogenicity and mutagenicity of molybdenum in pregnancy rats.MATERIALS AND METHODS:105 pregnant Wistar rats,75 for teratogenicity test,30 for micronucleus test,were randomly divided into 5 groups.The rats in experimental groups were treated with 10,20 and 40 mg/kg molybdenum acid ammonium salts,in negative control group received normal saline and in positive group was given 20 mg/kg cyclophosphamide.Teratogenicity test was scheduled at day 20 of the pregnancy,and micronucle...