When Do Twins Start Crawling? What Twin Parents Need to Know
Parenting twins through the crawling stage is equal parts incredible and chaotic. One day you have two babies who stay where you put them. Then they start crawling and suddenly your entire house is a risk zone.
The crawling milestone for twins comes with a few specific dynamics that singleton parents don't deal with. Here's what to expect.
When Do Twins Typically Start Crawling?
For singleton babies, the average crawling range is 7–10 months. For twins — especially premature twins — this timeline often shifts.
Adjusted age matters. If your twins were born early, developmental milestones are typically measured from their adjusted age (due date) rather than their birth date. A baby born 8 weeks early who is 9 months old chronologically is developmentally closer to a 7-month-old. Most pediatricians will track milestones on the adjusted timeline.
Twins often hit milestones at slightly different times than singletons. Premature birth is more common in multiples, and premature babies have less time in the womb to develop the muscle tone that crawling requires. Full-term twins typically crawl on the same schedule as singletons.
Will Both Twins Crawl at the Same Time?
Probably not. And this is one of the most common concerns twin parents bring to their pediatrician — one twin is crawling, the other isn't, and the gap feels significant.
A few things to know:
Some gap is completely normal. Even identical twins develop at their own individual pace. A 4–6 week gap in reaching a milestone is within normal range and doesn't indicate a problem with the later twin.
The earlier crawler is a motivator. Babies are natural mimics, and having a sibling who is already moving is actually a developmental advantage. The non-crawling twin will often watch the crawling twin closely and begin attempting the same movements within a few weeks.
Position in the womb affects development. Twins share space in ways that can affect muscle development and position preferences. It's common for one twin to have slightly stronger upper body strength and one to have stronger lower body strength based on how they were positioned. This can affect which crawling style each baby develops and when.
The Challenge of Two Crawlers at Once
Managing one newly mobile baby is a full-time job. Managing two simultaneously mobile babies is a different category of challenge.
Baby-proofing needs to happen faster. With a singleton, you often have a few weeks between "starting to move" and "actually getting somewhere dangerous." With twins, one of them may have been scouting your living room for weeks before the second one starts moving — and then suddenly you have two of them heading in different directions at full speed.
Floor time logistics. Two babies on the floor together will inevitably end up in each other's space — crawling over each other, competing for the same toy, pulling each other's hair. This is normal and actually good for development (learning to navigate another person's presence), but it requires supervision.
Knee protection doubles. Two babies crawling means two sets of knees taking daily impact. Whatever solution you use for floor protection — padded clothing, play mats, rugs — you'll need it for both of them consistently.
Encouraging Both Twins Equally
When one twin is crawling and one isn't, it's natural to focus extra tummy time and encouragement on the non-crawling baby. This is fine and appropriate. A few things that help:
Tummy time for both, every day. Even the twin who is already crawling benefits from continued tummy time — it builds the shoulder and core strength needed for pulling up and walking next.
Parallel floor play. Setting both babies up in the same space with separate toys encourages both to move independently rather than one following the other.
Don't compare to the other twin out loud. Babies don't understand comparison, but the energy around it can create anxiety. Each twin is on their own timeline even if that timeline differs by a few weeks.
When to Mention It to Your Pediatrician
Bring it up at your well visit if either twin shows: - No interest in movement of any kind by 10–11 months (adjusted age) - Significant asymmetry — strongly favoring one side of the body - Regression — was moving and has stopped - Very significant gap between twins (more than 2–3 months) with no improvement
The crawling stage with twins is intense but brief. Most families look back on it as one of the most physically demanding periods — and one of the funniest. Two crawling babies discovering the world at the same time, heading in opposite directions, is something you don't forget.
Make sure both of those sets of little knees are protected for the journey.