At what size PLACENTOMEGALY is diagnosed on USG?
**Core Concept**
Placentomegaly refers to the abnormal enlargement of the placenta, which can be diagnosed using ultrasonography (USG). This condition is often associated with various maternal and fetal complications. The diagnosis of placentomegaly is crucial for proper management and outcome.
**Why the Correct Answer is Right**
The correct answer is based on the definition of placentomegaly, which is typically diagnosed when the placental thickness exceeds 4 cm at or beyond 36 weeks of gestation. This measurement is critical in identifying potential complications such as fetal macrosomia, gestational diabetes, and preeclampsia.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately reflect the threshold for diagnosing placentomegaly.
**Option B:** Similarly, this option is incorrect as it underestimates the placental thickness required for the diagnosis.
**Option D:** This option overestimates the required placental thickness, making it an incorrect choice.
**Clinical Pearl / High-Yield Fact**
Placentomegaly is a significant finding that requires close monitoring of both the mother and the fetus. It is essential to remember that placentomegaly can be associated with various maternal and fetal complications, making timely diagnosis and management critical.
**Correct Answer:** C. 4 cm