Einfluß von Kontrazeptiva auf die Verdaulichkeit des Nahrungsproteins und die N-Bilanz

The present paper deals with the effects of the hormonal contraceptives Deposiston and Gravistat on the digestibility of dietary crude protein and on the urine excretion of nitrogen. The substances under test were given to 9 women between 18-25 years of age. The fecal and urinary nitrogen were determined in the first 2 cycles during which no contraceptives were used and also in the subsequent 3 cycles during which Deposiston and Gravistat were taken by mouth. The preperiod extended over 3 days and the sampling for 4 days. The apparent digestibility of the dietary protein was only slightly increased by the contraceptives. In the case of Deposiston it amounted to 85.0% (1st cycle) 86.0% (2nd cycle) 87.3% (3rd cycle) 87.1% (4th cycle) and 88.2% (5th cycle). Deposiston and Gravistat did not affect the urine excretion of nitrogen nor the nitrogen balance. (authors) (summaries in ENG RUS)