Incidence of breech presentation at term is?

**Core Concept**
Breech presentation is a type of fetal presentation where the baby's buttocks or feet are positioned to be born first, rather than the head. This occurs due to various factors, including fetal positioning, placental location, and uterine abnormalities. Breech presentation is a significant concern in obstetrics as it increases the risk of complications during delivery.

**Why the Correct Answer is Right**
The incidence of breech presentation at term is estimated to be around 3-4%. This is because, as the pregnancy advances, the head of the fetus tends to engage into the pelvis, making it less likely for the breech presentation to persist. The exact mechanism is not fully understood, but it is thought to be related to the fetal movements and the flexibility of the fetal spine. The American College of Obstetricians and Gynecologists (ACOG) defines term as 37 weeks of gestation or more.

**Why Each Wrong Option is Incorrect**
**Option A:** 10-15% is too high, as breech presentation is relatively rare at term.
**Option B:** 1-2% is too low, as breech presentation is more common than this estimate suggests.
**Option C:** This option is not provided, so there is no information to evaluate.

**Clinical Pearl / High-Yield Fact**
It is essential for obstetricians to accurately diagnose breech presentation, as it may require a cesarean delivery or external cephalic version (ECV) to correct the fetal position. The American College of Obstetricians and Gynecologists (ACOG) recommends that breech presentation be managed by an experienced healthcare provider.

**Correct Answer: D. 3-4%.**