title: Letter: Von-Willebrand-factor activity in pregnancy.
mesh_terms: D000941:Antigens; D001780:Blood Coagulation Tests; D005169:Factor VIII / Q000276:immunology*; D005260:Female; D006801:Humans; D010974:Platelet Aggregation; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D013997:Time Factors; D014842:von Willebrand Diseases / Q000097:blood / Q000276:immunology*
chemical_list: D000941:Antigens; D005169:Factor VIII