<prompt> Traction force required for forceps delivery in primigravida is :15 kgs18-20 kgs13 kgs25 kgs  <response>: Traction force required by forceps is: Primigravida -18-20 kgs Multigravida-13 kgs Vacuum - initial pressure is 0.2 kgcm2 induced over 2 minutes. The pressure is gradually increased at the rate of 0.1 kgcm2 to a maximum of 0.8 kgcm2. Ref: Datta Obs 9e pg 533. 