title: The radioimmunoassay of human placental protein 14 (PP14).
abstract: The development and validation of a radioimmunoassay for the measurement of human placental protein 14 in maternal serum is described. The mean concentration of this protein in serum from 22 normal pregnant women showed a decline during the third trimester from 120 micrograms/l at 27 weeks gestation to 65 micrograms/l at term. Serum samples from 16 patients with intra-uterine growth retardation tended to contain lower concentrations of placental protein 14, these results reaching significance at weeks 36-38 of gestation. Of seven patients with pre-eclampsia from whom two or more blood samples were taken, four showed increases in concentration of this protein as pregnancy proceeded, compared with the normal pattern of decreasing values.
mesh_terms: D001800:Blood Specimen Collection; D005260:Female; D005317:Fetal Growth Retardation / Q000097:blood; D005865:Gestational Age; D006801:Humans; D011225:Pre-Eclampsia / Q000097:blood; D011247:Pregnancy; D011863:Radioimmunoassay / Q000379:methods*; D012016:Reference Values