External cephalic version is now a days done at –
**Core Concept**
External cephalic version (ECV) is a procedure where a healthcare provider attempts to manually turn a fetus from a breech position to a cephalic (head-down) position. This is typically done between 37 and 42 weeks of gestation.
**Why the Correct Answer is Right**
The American College of Obstetricians and Gynecologists (ACOG) recommends performing ECV between 37 and 42 weeks of gestation, as the risk of complications increases after 40 weeks. The optimal time for ECV is usually between 37 and 38 weeks, when the fetus is still in a favorable position and the uterus is not too large to manipulate. The procedure is typically done under ultrasound guidance to ensure the safest and most effective outcome.
**Why Each Wrong Option is Incorrect**
**Option A:** Some sources may suggest a different time frame, but ACOG's guidelines are the most widely accepted and up-to-date recommendations.
**Option B:** While ECV can be attempted later in pregnancy, the risk of complications increases, and the success rate decreases after 40 weeks.
**Option C:** There is no evidence to support ECV being performed before 37 weeks, as the fetus may not be in a stable enough position for the procedure.
**Clinical Pearl / High-Yield Fact**
A successful ECV is more likely to occur when the fetus is in a left occiput transverse (LOT) position, as this position allows for easier manipulation and a higher success rate.
**Correct Answer: A. Between 37 and 42 weeks of gestation.**