Imaging Studies
- Portable radiographs inform the practitioner if the fetal head is hyperextended and indicates the shape of the maternal pelvis and type of breech presentation.
- Limited bedside pelvic ultrasonography: The mainstay for fetal assessment, if breech presentation is suspected, obtain a sonogram to confirm or refute suspicions. In addition to fetal presentation, a sonogram may reveal other fetal and/or uterine abnormalities. See image below.
Ultrasound demonstrating a fetus in breech presentation with a hyperextended head (ie, "star gazing").
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| Gestational Age, Weeks | Breech, % |
| 21-24 | 33 |
| 25-28 | 28 |
| 29-32 | 14 |
| 33-36 | 9 |
| 37-40 | 3-4 |

