What is one cause of infants being classified as large for gestational age (LGA)?

• A. Infant of diabetic mother
• B. Maternal hypertension
• C. Multiple gestation pregnancies
• D. Inadequate maternal nutrition

Answer: (A)

Infants are classified as large for gestational age (LGA) when they are significantly heavier or larger than the average for their gestational age, typically above the 90th percentile. One major cause of this classification is when the infant is born to a mother with diabetes, particularly gestational diabetes or pregestational diabetes.

In the case of infants born to diabetic mothers, the elevated levels of glucose in the maternal bloodstream can lead to increased insulin production in the fetus. Insulin acts as a growth factor, promoting fat and tissue development, which can result in the infant being larger than average. This mechanism is primarily why infants of diabetic mothers tend to be classified as LGA; they often experience excessive growth due to the glucose that crosses the placenta and the resulting fetal insulin response.

Other factors, such as maternal hypertension or inadequate maternal nutrition, do not typically lead to increased fetal size in the same way. Maternal hypertension can lead to growth restrictions due to placental insufficiency, while inadequate maternal nutrition more often results in low birth weights or growth-restricted infants. Multiple gestation pregnancies can lead to varying growth patterns, but they are not predominantly associated with being LGA, as one would expect individual infants to be smaller when in a