A transverse-oval os uteri or Emmet' tear are the result of a tear at the mouth of the womb during final cervical dilatation. Furthermore, they are the cause of a more or less developed ectopia and combined cervical and vaginal fluor with concomitant colpitis. These alterations also represent the foundation not the cause, of a development of cervical carcinoma. In the sense of prophylactic reasoning the elimination of the symptoms mentioned above should be considered. -- The use of the speculum and care of the suture of the nearly always torn os uteri after each delivery must be the first step to avoid the development of a collum carcinoma. -- In the second place, electrocoagulation or shallow conisation with subsequent coagulation and cryo-surgical treatment of the ectopia has to be carried out. -- Therefore the obstetrician decides whether the patient -- in view of developing a collum carcinoma -- becomes a risk patient. He has to ensure that an almost normal portio uteri returns without ectropion and Emmet'tear and also without cervical and vaginal fluor, which could trouble the patient considerably. -- After every delivery, therefore, the speculum should be used. At the same time a cervix tear haemorrhage, one of the most frequent exsanguinations, can be avoided.