<prompt> Which type of placenta pre is this?Type 4Type 2Type 1Type 3  <response>: Type 2 placenta is a placenta in the lower segment but not covering the os. A posterior type 2, as shown in this figure, is an indication to do a caesarean section as the fetal head can compress the placenta against the sacrum when the head is entering the pelvis. This can cause fetal hypoxia. 