[Amniocentesis in the 2d trimenon: comparison of 2 technics]

The results of 1245 amniocenteses performed by the "free hand needle" technique and ultrasonic control are discussed. The use of ultrasonic control showed a much lower incidence of blood-stained amnionic fluid as well as a decreased number of repeated punctures of the amnion. The abortion rate was almost the same in both groups. According to our experience ultrasonic controlled puncture seems to be more reliable in terms of safety and success.