During a high-risk delivery with a breech presentation, which type of breech is described when the buttocks present first?

In a breech presentation, the term "complete breech" is used to describe a situation where the buttocks are positioned first, and the fetus is curled up with knees and hips flexed. This means that both the lower extremities and the buttocks are closest to the birth canal during delivery. The defining characteristic of a complete breech is that the fetal legs are bent at the knees, with the feet positioned near the buttocks, making them less likely to get compressed or obstructed during passage through the birth canal.

In contrast, "frank breech" refers to a position where the buttocks still present first, but the legs are straightened upwards, with the feet near the head, creating a taller and more extended shape. "Incomplete breech," on the other hand, describes a scenario where one or both of the legs are extended downward, which can increase the risk of cord prolapse and other complications during delivery. Finally, a "transverse lie" is when the fetus is positioned horizontally in the uterus, which is a different presentation altogether and is not classified as a breech position.

Thus, the definition and positioning associated with a complete breech clearly aligns with the scenario described in the question, making it the