37.IN FACE PRESENTATION THE ENGAGING DIAMETER IS
A.SUBMENTO BREGMATIC
B.VERTICO MENTAL
C.SUB OCCIPITO BREGMATIC
D.OCCIPITO MENTAL
ANS:SUBMENTO BREGMATIC
When the attitude of the head is one of complete extension, the occiput of the fetus will be in contact
with its spine and the face will present. The incidence is about 1:500 and the majority develop during labour from vertex presentations with the occiput posterior; this is termed secondary face presentation. Less commonly, the face presents before labour; this is termed primary face presentation. There are six positions in a face presentation the denominator is the mentum and the presenting diameters are the
submentobregmatic (9.5cm) and the bitemporal (8.2cm).
A.SUBMENTO BREGMATIC
B.VERTICO MENTAL
C.SUB OCCIPITO BREGMATIC
D.OCCIPITO MENTAL
ANS:SUBMENTO BREGMATIC
When the attitude of the head is one of complete extension, the occiput of the fetus will be in contact
with its spine and the face will present. The incidence is about 1:500 and the majority develop during labour from vertex presentations with the occiput posterior; this is termed secondary face presentation. Less commonly, the face presents before labour; this is termed primary face presentation. There are six positions in a face presentation the denominator is the mentum and the presenting diameters are the
submentobregmatic (9.5cm) and the bitemporal (8.2cm).
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