Ultraschall in der Medizin : Organ der Deutschen Gesellschaft für Ultraschall in der Medizin, [der] Österreichischen Gesellschaft für Ultraschall in der Medizin, [der] Schweizerischen Gesellschaft für Ultraschall in Medizin und Biologie
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In obstetrics the main advantage of transvaginal sonography is in the first trimester. It is possible to diagnose normal or abnormal pregnancy or ectopic pregnancy earlier and more exactly than with transabdominal ultrasound. Furthermore different foetal malformations can be detected within the first trimester. ⋯ However, transvaginal scanning can be a useful adjunct in cases where the foetal head is deeply engaged or for the visualisation of a foetal organ that is close to the vaginal probe. Transvaginal colour Doppler as well as transvaginal 3 D-volume scanning represent new aspects of transvaginal sonography in obstetrics and gynaecology. These techniques will provide progress especially in tumour diagnosis in the lower pelvis in the future.