effect of chronic exposure to 50% nitrous oxide in oxygen on the foeti of albino rats

thisworkwas performed to study the effect ofof females to 50% mixture of nitrouschronic exposureoxide and oxygen on their foetiOne hundred and fifty albino rats; one hundred andtwentyfemaleswereused in theandthirtymales,investigationThe female albino rats were classifiedfor purposeoutofofcomparisonthe fourinto four equal groupsgroups were exposed to theanaesthetic gas mixture for thirty days after which thefemale rats of groups 1& 11 were let to get pregnantthe pregnant females of group 1 exposure wascontinued during the whole period of pregnancy whileof group 11 passed the period of pregnancy inatmosphere Female rats of group III hadinairbefore pregnancy wasair during the period.