Effect of passive smoking amount on nucleated red blood cells in neonates
ObjectiveTo determine the nucleated red blood cell(NRBC)counts of passive smoking pregnancy and to study the relationship between cotinine concentration and nucleated red blood cell counts.MethodsThe demography of neonate were recorded.Cord vein blood of neonates were collected in passive smoking group(n=53) and non smoking group(n=41) were detected for complete blood cell index,nucleated red blood cell counts and cotinine concentration.ResultsThe passive smoking neonates had lower birth weight than that of control group(P0.05) and higher nucleated red blood cell counts(P0.05).NRBC counts in cord vein blood were significantly higher than those of control group(P0.05).The concentration of cotinine in cord vein blood was positively related with passive smoking amount(r=0.04,P0.01),however,NRBC counts in cord vein blood was not related with passive smoking degree(P0.05).ConclusionPassive smoking in pregnant period could cause the increase of nucleated red blood cell counts and the increase degree is not related to passive smoking amount.