Which presenting part defines a frank breech?

• A. Buttocks
• B. Feet
• C. Head
• D. Shoulders

Answer: (A)

The presenting part is the part of the fetus that first reaches the birth canal. In a frank breech, the buttocks are the first part to present, with the legs extended up toward the chest. That makes the buttocks the presenting part. This differs from other presentations: feet would indicate a footling breech, the head presenting indicates a cephalic (head‑first) delivery, and the shoulders presenting would involve a shoulder presentation rather than breech.