The corrected or adjusted age is the age that the child would be if born at the estimated due date. For example, a mother’s expected delivery date is the end of February, but she gives birth after only 32 weeks of pregnancy, on January 1st. Her child will celebrate her six-month birthday on July 1st, but her corrected age is only four months, because she was born eight weeks earlier than expected.
The corrected age is used to evaluate the preemie’s growth and development, since it takes the missing weeks of pregnancy into account. When introducing solids to the baby, the corrected age should be used to consider the actual intestinal maturity. The corrected age is used until the child reaches two years of age, except for the vaccination schedule, which follow the child’s chronological age, health permitting.