Behaviour of HPL and GH plasmatic rate in pregnant women at different times of their pregnancy during dynamic tests.

The authors have studied the effects of an oral or intravenous glucose load, of insulinic hypoglycemia, of arginine and the effects of the 2-deoxi-glucose on the plasmatic concentration of HPL and GH on pregnant women at different times during their pregnancy. None of the used tests seemed able to modify in any way the plasmatic concentration of the placental lactogen hormone; the somatotropinic response to the different stimuli happens to be lower than that found in non pregnant women of the same age. We and by asserting that unlike what happens with the GH, there does not exist a direct "feedback" between the modifications of plasmatic concentration of the main underlayers and HPL.