title: Changes in factor XI (plasma thromboplastin antecedent) levels during pregnancy.
mesh_terms: D001810:Blood Volume; D005172:Factor XI / Q000032:analysis*; D005173:Factor XI Deficiency; D005176:Factor XIII / Q000032:analysis; D005260:Female; D005865:Gestational Age; D006801:Humans; D049590:Postpartum Period; D011247:Pregnancy; D013223:Statistics as Topic; D013997:Time Factors
chemical_list: D005172:Factor XI; D005176:Factor XIII