A Study Of Hemoglobin And Ferritin Levels In Normal Pregnant Women After Vaginal Delivery

Objective:(1).To investigate the levels of hemoglobin and ferritin at different times of puerperal period in normal pregnant women after vaginal delivery;(2).To investigate the physiological changes of hemoglobin and ferritin in normal pregnant women due to blood dilution during puerperium after vaginal delivery;(3).To explore the appropriate time and threshold for screening puerperal anemia.Methods:The study population included women who delivered vaginally after 37 weeks' gestation(n = 103).They were tested for hemoglobin,erythrocyte(RBC)and hematocrit(HCT)before delivery and at 24 hours,48 hours 72hours,7 days and 42 days after delivery,tested for ferritin before delivery and at 24 hours,7 days and 42 days after delivery.According to the ferritin level before delivery,it was divided into normal group and iron deficiency group(ferritin < 20ug/L was considered to be iron deficiency).Using SPSS 17.0 statistical software to analyze data.Using two factors repeated measurement anova,t-test,and single-factor repeated measurement anova to analyze the data.Results:1.Group interaction with time factor of Hb,RBC has no influence.Both of them showed the same trend over time: a significant decrease in postpartum 3d followed by a significant increase to postpartum 7d,and a slow increase from postpartum 7d topostpartum 42 d.2.Interaction between group and time factors had statistical significance on HCT and SF.The postpartum SF showed a continuous upward trend,which is quite significant after postpartum 24 h to postpartum 7d.The growth trend of iron deficiency group was slower than that of the normal group.3.No apparent difference between the two groups of HCT levels in prenatal(P >0.05).Iron deficiency were less than normal group at different times in postpartum time,and that difference was statistically significant(P < 0.05).4.The Hb level of the two groups reached its lowest point at 24 h after delivery,while that of the normal group increased significantly close to the prenatal level at 7d after delivery,and the difference was not statistically significant(P > 0.05).Conclusion:Due to blood dilution,the descent of hemoglobin is conspicuous within 3 days after labor,in particular the first 24 hours,leading to physiological anemia.It is more accurate to screen hemoglobin at 7 day after delivery.It is suggested that joint ferritin screening assess maternal iron deficiency.