title: [Preliminary study on the ratio of amniotic fluid accelerated clotting time (ACT) to plasma prothrombin time (PT) in estimating fetal maturity].
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis / Q000502:physiology*; D001780:Blood Coagulation Tests; D005260:Female; D005325:Fetal Organ Maturity; D006801:Humans; D010713:Phosphatidylcholines / Q000032:analysis; D011247:Pregnancy; D011517:Prothrombin Time; D013109:Sphingomyelins / Q000032:analysis
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins