[Early ultrasonic diagnosis of anencephaly and iniencephaly (author's transl)].

The routine and repeated ultrasonic examination during pregnancy gives the possibility of observing fetal malformation, especially of the head and the spinal column, at an early stage of pregnancy. One case of anencephalus and two cases of iniencephalus diagnosed by ultrasonic between the 16th and 28th week of pregnancy are described. The method is compared with other diagnostical possibilities and the consequences for the further pregnancy are discussed. The ultrasonic examinations were done with the Vidoson 635 from Siemens Company/Erlangen.