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occiput


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n. the back of the head. In obstetrics, the occiput is used as a denominator when a fetus presents by the vertex (see presentation). The most favourable position for delivery is occipitoanterior (or occipital anterior), with the occiput of the fetus presenting towards the anterior aspect of the maternal pelvis as it enters the pelvic inlet. In the occipitotransverse (or occipital transverse) and occipitoposterior (or occipital posterior) positions, the occiput presents towards the lateral and posterior aspects, respectively, of the maternal pelvis; these are malpositions. —occipitaladj.

Subjects: Medicine and Health.


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