Which presentation is defined by the fetus presenting parts being limbs, making vaginal delivery impossible?

• A. Prolapsed cord
• B. Breech birth
• C. Limb presentation
• D. Nuchal cord

Answer: (C)

Limb presentation occurs when an arm or leg is the part that would come out first. Because a limb is narrow and doesn’t fit the birth canal the same way the head or buttocks do, vaginal delivery cannot proceed safely or effectively, making this presentation untenable for a normal delivery. This is why limb presentation is the correct choice here. For contrast, a prolapsed cord means the umbilical cord presents before the baby and can compress the cord; a breech birth is when the buttocks or feet present first (sometimes still deliverable vaginally with special care); a nuchal cord is when the umbilical cord wraps around the baby’s neck. The defining factor in limb presentation is that a limb is the presenting part, which blocks a normal vaginal passage.