What defines an incomplete breech presentation?

An incomplete breech presentation is characterized by one or both hips not being fully flexed. In this particular presentation, the fetal body position can lead to an arrangement where the hips are not fully flexed while the legs may be extended or flexed to varying degrees. This definition distinguishes it from other breech presentations, such as complete breech presentation where both hips and knees are flexed, or frank breech where the hips are flexed but the knees are extended. Recognizing these distinctions is crucial in obstetrics, as they influence delivery approaches and potential complications associated with breech presentations. Understanding the nuances of fetal positioning can significantly impact management during labor and delivery.