Ritgen maneuver is done in

Ritgen manuever is done for delivery of head in normal labor to allow controlled delivery of head. When the head distends the vulva and perineum enough to open the vaginal introitus to a diameter of 5cn of more , a towel is drapled ,gloved hand may be used to exe forward pressure on the chin of fetus through the perineum just in front of coccyx. Concurrently the other hand exes pressure superiorly against occiput. This ours nect extension so that the head is delivered with its smallest diameter passing through the introitus and over perineum