|DEFINITION: |RELATED DIAGNOSTIC TESTS: |
|The relationship between the measurements of the fetal head and the diameters of the maternal pelvis. |Ultrasound of fetus to determine presentation and lie. |
| |Manual exam before labor |
| |CT scan with estimated weight of fetus. |
| | |
|ETIOLOGY: |MEDICAL MANAGEMENT: |
|The birth passage includes the maternal bony pelvis, beginning at the pelvic inlet and ending at the pelvic|The adequacy of the maternal pelvis for a vaginal birth should be assessed both during and before labor. |
|outlet. A narrowed diameter in these areas can result in CPD if the fetus is larger than the pelvic |During the intrapartal assessment, the size of the fetus and its presentation, position, and lie must also |
|diameters.