Twin Milestones: What to Expect (And What to Stop Comparing)

With a singleton, you compare your child to charts and averages. With twins, you compare your children to each other — and the comparison is right there in front of you, every day, in real time.

The problem is that twins are individuals. They share a birthday, a household, and often a bedroom — but they don't share a developmental timeline. One may talk first. One may walk first. One may read first. None of that means the other is behind. That comparison adds to the daily mental load of raising twins.

Twins — especially premature twins — often reach some milestones slightly later than singletons. This is normal and expected. Adjusted age matters. If your twins were born at 36 weeks, their developmental milestones should be measured from their due date, not their birth date.

Most twins catch up fully by age 2-3. The early gaps that feel enormous at 12 months are often invisible by kindergarten.

Celebrate each child's milestones independently. When one walks, celebrate that child. Don't immediately look at the other one and wonder when they'll follow.

Keep separate developmental notes if you can. It forces you to see each child as an individual rather than half of a pair.

Talk to your pediatrician about your specific twins — not about how they compare to each other, but about whether each child is on their own healthy trajectory.

Here's the reframe: different timelines mean different strengths. The child who walked later may have been developing language. The child who talked later may have been perfecting motor skills. They're not racing each other. They're becoming themselves. It takes the same patience and persistence you need in every other part of twin parenting.

And watching two people become themselves, simultaneously, from the very beginning — that's one of the most extraordinary things about raising twins.