malpresentation
Any fetal presentation other than vertex (head-down) position, including breech, transverse, or face presentations.
Full Definition
Malpresentation refers to any fetal presentation at the time of delivery other than the normal vertex presentation where the fetal head presents first with the occiput as the leading part. Common malpresentations include breech presentation (buttocks or feet first), transverse lie (fetus lies sideways), face presentation (face presents first), and compound presentation (more than one fetal part presents simultaneously). Malpresentations occur in approximately 3-5% of pregnancies and may require specific management strategies including caesarean delivery, external cephalic version, or assisted vaginal delivery techniques.
Usage
Usage note: Distinguish from malposition - presentation refers to the part presenting first, position refers to the relationship to maternal pelvis.
In Context
- "Ultrasound confirmed malpresentation with the fetus in transverse lie at 36 weeks." — Antenatal scan report
- "Persistent malpresentation prompted discussion of delivery options including elective caesarean section." — Birth planning documentation