Hello, I'm an expert in the field of pediatrics and neonatal health. When it comes to the size of newborns, there's a range that's considered normal. The average weight for a full-term baby is typically between 5.5 and 8.8 pounds (2500 to 4000 grams).

Now, let's address your question: Is a 9-pound baby big?

Yes, a baby weighing 9 pounds (4000 grams) is considered to be on the larger side. This is above the average weight for a newborn and can sometimes be associated with conditions such as macrosomia, which is defined as a birth weight of over 8 pounds, 13 ounces (4000 grams) in a full-term baby. Larger babies may require additional monitoring after birth, and the delivery process can sometimes be more complicated, potentially requiring interventions like a C-section.

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The average size of a healthy, full-term newborn is 7-1/2 pounds. When a baby weighs at least 4000 grams (8 pounds, 13 ounces) or 4500 grams (9 pounds, 15 ounces) he is considered macrosomic, literally meaning "large body." Your doctor or midwife may use ultrasound or fundal height measurements to estimate baby's size.read more >>