EFFECT OF GROWTH HORMONE AND OF PREGNANCY ON THE HYDROXYPROLINE CONCENTRATION OF THE BLOOD OF RATS

Abstract
The hydroxyproline concentration of the blood of rats was determined during pregnancy and after the administration of growth hormone, 30 tibia units daily for 3 weeks, and compared with values of control animals. Without growth hormone, the mean value for 10 pregnant animals was 1.5 [mu]g/ml hydroxyproline compared with the mean of 1.0 [mu]g/ml for 10 non-pregnant animals. With growth hormone administration the mean hydroxyproline concentration of 11 non-pregnant animals was 1.6 [mu]g/ml compared with a mean of 1.8 [mu]g/ml for 10 pregnant animals.