Relationship between Placental Alkaline Phosphatase Phenotypes and the Frequency of Spontaneous Abortion in Previous Pregnancies

Abstract

Previous results on an association between placental alkaline phosphatase phenotypes and the frequency of spontaneous abortion in a material from Uppsala in southern Sweden were confirmed in a hospital series study from Honolulu. A study from Umeå in northern Sweden showed contradictory results, however, which leaves the question of an eventual relationship between placental alkaline phosphatase phenotypes and abortion rate open.