[Experience with ultrasonic placentography].

The authors review their procedure adopted at ultrasonic placentography. Examinations were done before amniocentesis in 21 cases and because of supposed placenta praevia in 111 cases. Patients delivered at thier institution, so the site of placental implantation could be controlled. They had only one "dangerous" mistake: considering a placenta praevia to be only placental implantation on the lower segment, otherwise ultrasonic diagnosis was wrong in 5 cases. So the efficience of our method can be taken as 96,2 per cent. The call attention to the difficulties of of posterior wall placenta diagnosis. They state that ultrasonic placentography is the least harmful among available procedures and also the safest way the localisation of placenta.