 Regarding ethical aspects it is noted that the study is carried out with the highest standard of design, and with a proven drug without unexpected side effects or disadvantages. In the literature, there seems no evidence to suspect an increased risk of blood clot formation using the drug. However, it seems clear that the incidence of complications associated with hysterectomy is quite high. It is therefore ethically fully responsible and appropriate to carry out the planned study with the desire to ensure the quality and improve hysterectomy, surgery. 