On per vaginal examination, anterior fontanelle and supraobital ridge is felt in the second stage of labour. The presentation is :-
Brow presentation is the rarest variety of cephalic presentation where the presenting pa is the brow and the attitude of the head is sho that of degree of extension necessary to produce face presentation Causes- Anencephaly(most common cause) Intrauterine death Multiparity Prematurity The position is to be confirmed on vaginal examination by palpating supra orbital ridges and anterior fontanelle Case with persistent brow presentation are delivered by cesarean section
Brow presentation
Deflexed head
Flexed head
Face presentation
Labour - III