Dr. Le-Bucklin’s Answer:
Anytime a child does not reach a milestone at the expected age, it’s a reason for closer monitoring. That being said, in general, if a child reaches milestones somewhat later, but continues to achieve milestones consistently, there typically is not a problem.
Healthy premature babies are good examples of babies for whom it may be normal to reach milestones later, but consistently. Pediatricians typically adjust the age when we expect a premature baby to reach their developmental milestones by the number of weeks a baby was premature. We continue to adjust for prematurity until 2 years of age.
Note: I was recently interviewed by Lani, the mother of triplets and co-founder of the Multiples and More Blog Network. This question was from our interview.