[Vaginal sonography in follow-up of early pregnancies--applications in general practice of established gynecologists].

In 541 early pregnant women transvaginal sonography (TVS) was performed between 5th and 9th week of gestation. The correct gestational age was verified and information on normal development of the embryo was collected with this routine sonographic control. In one-third of 541 patients disturbances of the pregnancy were found directly or a TVS control was recommended. In 116 cases the gestational age, determined by calculating the period since the last menstruation, had to be corrected by sonographic results. In 12 women ectopic pregnancies without any symptoms were found. Only 47 women of 251 evaluated patients had no risk in pregnancy.