title: The radioimmunoassay of placental protein 5 and circulating levels in maternal blood in the third trimester of normal pregnancy.
abstract: A radioimmunoassay has been developed for placental protein 5 (PP5), a product of the human placenta. Circulating concentrations of PP5 were measured in the third trimester of normal pregnancy in 400 women. Concentrations of PP5 showed a skewed distribution and rose progressively to reach a plateau in the last four weeks of pregnancy. The development of this assay will permit studies on the potential clinical application of maternal PP5 levels during normal and abnormal pregnancy.
mesh_terms: D003429:Cross Reactions; D005260:Female; D006023:Glycoproteins; D006801:Humans; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000097:blood*; D011263:Pregnancy Trimester, Third; D011863:Radioimmunoassay
chemical_list: D006023:Glycoproteins; D011257:Pregnancy Proteins; C021240:tissue-factor-pathway inhibitor 2