among the endocrine parameters considered to be the most important ones from the point of view of the regulation of parturition the concentration of oestrogens ( oestradiol , oestriol and oestrone ) , progesterone , pgf2 alfa and its degradation product pgfm , was determined in both peripheral and uterine venous blood by ria method in rats starting from the 15th day of pregnancy to the 3rd or 4th day following parturition .
C0014939
oestrogens
C0032961
pregnancy