Abstract
The aim of this work is to evaluate levels of placental growth hormone (PGH), pituitary growth hormone (GH1), insulin-like growth factor (IGF-I) and ghrelin in pregnant women's blood serum before, during and after delivery. Furthermore, the aim is to search for links and interdependence of GH1, PGH and IGF-I concentrations. Seventy nine blood samples were taken one to two hours before, during and half an hour after expulsion of placenta. All proteins studied were determined by ELISA method, using ELISA Kit. The highest PGH concentration and IGF-I concentration in pregnant women's blood serum was observed before delivery while GH1 concentration was lowest. During and after delivery PGH and IGF-I concentration decreased proportionately and pituitary growth hormone concentration increased accordingly. About half an hour after delivery of the placenta, GH1 concentration was highest. In pregnant women's blood there is a metabolic interdependence between PGH and IGF-I. Their concentration increases proportionately during pregnancy and decreases after delivery. It appears that labor and delivery releases GH1 blockade, which level rises three-fold during delivery. After parturition its role and concentration returns to levels before pregnancy.
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