A contracted pelvis is one where the pelvic diameters are reduced below normal limits, potentially interfering with labor. Causes include developmental factors, malnutrition, trauma, and diseases affecting the bones. Diagnosis involves history, examination assessing pelvic and spinal abnormalities, and pelvimetry to measure diameters. In labor, the fetus's head may pass through a contracted pelvis via molding, asynclitic descent, or an altered rotation pattern depending on the type of contraction. Management ranges from a trial of vaginal delivery for minor issues to cesarean section for more severe disproportion.