Final answer:
Inadequate weight gain and low birth weight are of particular concern in pregnant adolescents, who may face undernutrition and growth issues for the infant.
Step-by-step explanation:
Inadequate weight gain and a low birth weight infant are of concern especially in pregnant adolescents. This demographic is at higher risk due to several factors, including potential for inadequate nutritional intake and a higher likelihood of insufficient prenatal care, which can lead to undernutrition and intrauterine growth restriction. These conditions result in infants being more susceptible to disease, increased risk of death in infancy, and may cause developmental delays and slow growth in children that survive infancy. The issue of undernutrition is a significant health concern as it can have long-term impacts on a child's development and overall health. Pregnant adolescents require careful monitoring to ensure that both the mother and the baby are getting the necessary nutrients for proper growth and development.