Flowchart summarizing the study design and inclusion and exclusion criteria of participants. HBV, hepatitis B virus; HCV, hepatitis C virus; HELLP syndrome, hemolysis, elevated liver enzymes, and low platelet count syndrome; ITP, primary immune thrombocytopenia; MPV, mean platelet volume; PLT_delivery, platelet counts at delivery; PLT_postpartum, platelet counts during the postpartum period; T1_PLT, platelet counts during the first trimester; T2_PLT, platelet counts during the second trimester; T3_PLT, platelet counts during the third trimester.