Hello, I'm an expert in pediatric health with extensive experience in neonatal care. When it comes to the birth weight of infants, there is a range that is considered normal. A 4 pound baby, which is equivalent to approximately 1800 grams, is generally on the lower end of the normal weight range for a full-term infant.

Full-term infants typically weigh between 5.5 pounds (2500 grams) and 8.8 pounds (4000 grams). However, it's important to note that a baby's weight can be influenced by various factors including gestational age, maternal health, and genetic factors. A baby weighing 4 pounds at birth may be normal if born slightly premature, but it could also indicate a need for closer monitoring and support, particularly if the baby was born at or near full term.

It's crucial for healthcare professionals to assess the baby's overall health and development to determine if any interventions are necessary. Parents should work closely with their healthcare provider to ensure the best possible care for their newborn.

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Mild prematurity refers to babies who are born between 33 and 36 completed weeks gestational age and/or have a birth weight between 1500 and 2500 grams (about 4 lbs to 5 lbs 8 oz). ... According to the WHO, babies born weighing less than 2500 grams or about 5 lbs 8 oz are defined as low birth weight babies.read more >>