How is the degree of prematurity defined in preterm birth (PTB)?

• A. By gestational age only
• B. By birth weight only
• C. By gestational age and birth weight
• D. By maternal age

Answer: (C)

The degree of prematurity in preterm birth is determined by both gestational age and birth weight. Gestational age is crucial because it provides a clear measure of the age of the fetus at the time of delivery, allowing healthcare providers to identify the risks associated with delivering a baby before the full term, which is typically around 40 weeks. Babies born preterm, particularly those born at lower gestational ages, are at a higher risk for various health complications.

Birth weight is also an important factor since it can indicate the overall health and development of the baby in utero. Low birth weight can result from prematurity or inadequate fetal growth, both of which can lead to significant health challenges. These two parameters together give a more comprehensive understanding of the infant's condition, aiding in the prediction of potential outcomes and necessary interventions.

Maternal age and other factors may be relevant in the broader context of pregnancy outcomes, but they do not explicitly define the degree of prematurity. In contrast, focusing on both gestational age and birth weight provides the necessary clinical information to assess the risks and management approaches appropriate for preterm infants.