Menstrual regulation by mean of endometrial aspiration.

The results of menstrual regulation performed in 181 cases of supposed pregnancy are described. In 166 cases (92%) pregnancy could be interrupted without dilatation of the os uteri and only in 15 cases (8%) was it necessary to dilate the cervical canal by 8.5--9.0 H units. The majority of pregnancies was interrupted by means of vacuum aspiration and only in 15 cases was curettage performed because of a supposed residue. In the postoperative period slight blood discharge occurred in 2 cases and in 1 case the choriodecidual residue had to be removed by curettage one week after vacuum aspiration. The advantage of the method are particularly remarkable in the interruption of the first pregnancy since it can be carried out without an injury to the cervical canal.