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n. (in obstetrics) an abnormal position of the fetal head when this is the presenting part in labour (see presentation). The head is in such a position that the diameter of the skull in relation to the pelvic opening is greater than normal (e.g. occipital transverse, occipital posterior: see occiput). This is likely to result in a prolonged and complicated labour.

Subjects: Medicine and Health.

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