By corrected gestational age .

Developmental milestones in premature babies should be assessed using corrected age (adjusted age) rather than chronological age, usually until 2 years of age.

Greetings Premature babies typically achieve developmental milestones according to their corrected age rather than their actual age. Corrected age adjusts for the number of weeks the baby was born early, providing a more accurate reflection of brain and physical development. pediatricians use this adjusted timeline for the first two years of life to monitor normal growth trajectories.

Its always according to corrected age

Preterm baby achives milestone according to corrected gestational age till 2 years of age.

Developmental milestones in preterm babies are assessed using corrected gestational age, not by chronological age. Usually upto 2 years it’s done this way

By corrected age only

For a premature baby, milestones are usually judged by corrected age, counting from your original due date rather than the actual birth date. This gives a fairer picture, since being born early naturally means the start is a little behind.