title: Relationship between placentation and maternal serum alpha-fetoprotein in twin pregnancies.
abstract: Maternal serum alpha-fetoprotein (MSAFP) concentration is raised in twin pregnancies during the second trimester. The approximate doubling of seAFP level in uncomplicated twin pregnancies seems logical, considering the doubled fetal source of AFP, even though the seAFP level is not always increased in twin pregnancies. What factors can influence this phenomenon? With this in mind, we have examined the seAFP concentration in 90 successive twin pregnancies with known outcome. The relationship between seAFP level and the type of placentation is demonstrated.
authors: Department of Obstetrics and Gynecology, University Medical School, Hungary.
authors: L
authors: L
authors: Veress
authors: M
authors: M
authors: Szabó
authors: Z
authors: Z
authors: Tóth
authors: Z
authors: Z
authors: Papp
mesh_terms: D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D010929:Placentation; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins