In obstetrics, a presentation where a baby is positioned transversely across the uterus rather than head-down, requiring intervention during delivery.
Compound from 'cross' + 'birth,' from medical terminology. Used in gynecology since at least the 18th century.
A crossbirth (transverse presentation) is one of the most dangerous childbirth positions—modern cesarean sections solved what was historically a leading cause of maternal death!
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