[Risk analysis of menstrual disorders in young women from urban population].

In the sample of 734 women, randomly chosen from the Warsaw population, we collected interviews dealing with menstrual cycle abnormalities. The frequency of amenorrhoea in this sample was 0.3% and that of oligomenorrhoea was 6.

[Evaluation of the diurnal rhythm of secretion of chorionic gonadotropins in the first trimester of normal pregnancy].

The authors evaluated the diurnal rhythm of the secretion of hCG in patients in the first trimester of normal pregnancy. The examination was carried out in a group of 22 patients (chosen at random) who came to hospital to undergo abortion (for social indications). The patients stayed in normal hospital conditions and were not given any drugs.