The article presents the results of research of α1-microglobulin (PAMG) placenta protein level in pregnant women which have a placental form of fetoplacental insufficiency. It is established, that during physiological pregnancy the PAMG level remains within the norm during all gestational period. In the placental form of fetoplacental insufficiency (FPI) the PAMG level increases beginning with the early embrional period. It increases 1.5–1.8 times during III trimester, which is higher than in women having a physiologic pregnancy and leads to the arrested fetus syndrome development.
