[Determination and assessment of the estrogen proliferation dosage on the human endometrium].

The term, 'proliferation dosage' of an estrogen is defined differently in the gynecologic literature. In this article the authors were concerned critically with the methods of its determination. They came to the conclusion that under standardized conditions sufficiently sure and reproducible results can be received in postmenopausal women. 7 short acting and 3 long acting estrogens, some of which are clinically unknown substances, were examined using the following definition of proliferation dosage: 'Proliferation dosage is the amount of an estrogen which induces the signs of the late proliferation phase after being administered daily in the course of 10 to 14 days to postmenopausal women with atrophic endometrium.' In order to investigate the proliferating properties of 3 depot estrogens a modified test procedure was performed, derived from animal experiments' results and the planned clinical mode of application.