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Dangers- Ill-fitting presenting part.The forewaters are not protected from the forces of uterine contractions, and are forced through an incompletely dilated cervix.
- Membranes rupture early and the cord may prolapse past the presenting part.
- Contractions may be irregular and poorly sustained. If moulding occurs, when the skull
bones overlap, the presenting part may become a better fit and the labour will perhaps
progress more normally; otherwise dilatation of the cervix is likely to cease temporarily
after the forewaters have ruptured. - In parous women labour may proceed quickly in spite of an ill-fitting presenting part.
With a malpresentation such as brow or shoulder there is a danger of obstructed labour and
uterine rupture if unrecognised.
Category:
Obstetrics Notes
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