Premature Infant

Prematurity is diagnosed based on gestational age, which is calculated from the date of the mother's last menstrual period or confirmed through early pregnancy ultrasound. At birth, the care team assesses the baby's gestational age, weight, and overall condition, often using a physical and neurological examination that evaluates features such as skin appearance, muscle tone, and reflexes to confirm the estimated gestational age. Because premature infants are at risk for a range of complications, a thorough newborn assessment typically includes monitoring of breathing, heart rate, oxygen levels, blood sugar, and body temperature, along with blood tests and imaging studies such as cranial ultrasound when indicated to check for brain bleeding or other concerns.

Care for a premature infant is tailored to the baby's gestational age and specific needs, and it often takes place in a neonatal intensive care unit where specialized equipment and continuous monitoring are available. An incubator or radiant warmer helps the baby maintain a stable body temperature, since premature infants lose heat quickly and cannot yet generate enough warmth on their own. Babies with underdeveloped lungs may need supplemental oxygen, a machine that assists breathing, or a medication called surfactant that helps the air sacs in the lungs stay open. Because premature infants often cannot yet coordinate sucking and swallowing safely, nutrition may initially be provided through a feeding tube or intravenously, with a gradual transition to breast or bottle feeding as the baby matures. Ongoing monitoring for jaundice, infection, and blood sugar imbalances is a routine part of care, and any complications that arise are treated as they are identified.

Many premature infants benefit from supportive therapies alongside medical treatment. Kangaroo care, in which the baby is held skin-to-skin against a parent's chest, has been shown to help stabilize heart rate and breathing, support temperature regulation, and promote bonding between parent and baby. Occupational and physical therapy may be introduced for babies who need help developing feeding skills or muscle tone. Because some premature infants remain at risk for developmental delays after leaving the hospital, ongoing developmental follow-up is often recommended so that any concerns with growth, vision, hearing, or motor development can be identified and addressed early.