The Relationship between Use of Low Molecular Weight Heparin during Pregnancy and Risk of Peripartum Adverse Events: A Meta-Analysis

Introduction: To summarize the trials investigated on relationship between low molecular weight heparin use during pregnancy and peripartum adverse events. Meta-analysis was performed to evaluate the effect of Low Molecular Weight Heparin (LMWH) on maternal and fetal complications. Methods: Electronic research was performed in Cochrane Library, MEDLINE and EMBASE through October 2020. The primary outcome was the incidence of maternal and fetal complications during peripartum period. RevMan 5.3 was used for data analysis. Results: 11 articles were finally included. Meta-analysis showed there was no significant difference in abortion, premature delivery, stillbirth, preeclampsia and postpartum hemorrhage events between pregnant women who used LMWH and those who not. Conclusion: Using LMWH in pregnant women does not increase pregnancy related maternal and fetal complications.