<prompt> Forceps should NOT be used in:Twin deliveryHydrocephalusPost maturityAfter coming head of breech  <response>: As discussed previouslyOne of the criteria to be fulfilled before applying forceps isthere should be no major cephalopelvic disproportion CPD by clinical pelvimetry and hydrocephalus is an important cause of CPD.Dutta Obs. 7e, p 352 