Ultrastructural localization of glycoprotein IIIa (GPIIIa, β3 integrin) on placental syncytiotrophoblast microvilli: implications for platelet alloimmunization during pregnancy

Abstract excerpt

BACKGROUND: Fetal and neonatal alloimmune thrombocytopenia due to anti-human platelet antigen (HPA)-1a more commonly occurs in first pregnancies, unlike hemolytic disease of the newborn. Anti-D is produced after D+ fetomaternal hemorrhage; this usually occurs at parturition. Anti-HPA-1a could develop during pregnancy if maternal immunization is stimulated by HPA-1a expressed not only on platelets but also on...

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