<prompt> Traction force required for forceps delivery In primigravida is:15 kg18 to 20 kg13 kg25 kg  <response>: Functions of forceps Traction force:in primigravidae the traction force required is about 20kg and that in multipara about 13 kg rotation of head:can be acheived by Kielland;s forceps act as a protective cage for head from the pressure of bih canal as in a premature baby, controlled delivery of the after coming head in breech D.C.DUTTA;S TEXTBOOK OF OBSTETRICS,pg no:574,7th edition 