[Detection of estradiol receptors in the cyclic endometrium]

In 41 women the 17 beta-estradiol-receptors were determined in the cytosol fraction. The highest concentrations were found in cases of glandular-cystic hyperplasia, were as in the cyclic endometrium the highest concentrations were recognized before the date of ovulation at a rate of 189,8 +/- 80 fmol/mg protein. --During the treatment with contraceptive drugs only a small content of receptors was observed in midcycle.