Your 7-Month-Old: Cause and Effect, and the Run-Up to Crawling
Written by the Growbaby team
Written against AAP, CDC, NIH and NHS guidance. How we write these guides
Published Aug 4, 2026 Updated Oct 16, 2026
At a glance
- Cause and effect clicks: push this, that happens, do it again.
- Banging two objects together is a genuine cognitive step, not just noise.
- The AAP says a baby may rock on hands and knees for a while before crawling, and puts crawling at seven to ten months.
- Standing while held takes real weight through the legs now.
- Repetition is the point; the hundredth time is as informative as the first.
The dropped spoon is not defiance. Around now your baby works out that their actions produce reliable results in the world, and the only way to confirm a rule is to test it repeatedly. Every drop is a small experiment with the same encouraging outcome.
Physically, the AAP describes rocking on hands and knees and, because the arms are stronger than the legs, pushing backwards before working out how to go forwards. It puts crawling itself at seven to ten months, so a seven-month-old who is not crawling yet is at the start of that range, not past it.
What is new this month
The dropped spoon is not defiance. Somewhere around now your baby works out that their own actions produce reliable results, and the only way to confirm a rule is to test it repeatedly. Every drop is a small experiment with an encouragingly consistent outcome.
Banging two objects together belongs to the same discovery. It needs both hands doing different jobs at once, and it produces a result your baby caused.
Crawling: what the sources say at seven months
The official ranges for crawling start around now and run well past this month. The AAP says it is usually mastered between seven and ten months; MedlinePlus says it may begin from 6 months. Before it starts, the AAP describes a baby who may rock on hands and knees and may push backwards first, because the arms are stronger than the legs.
Not every baby crawls. The AAP names bottom scooting and slithering on the stomach as alternatives, and its conditions are that your baby coordinates each side of the body and uses each arm and leg equally. Our crawling guide sets the ranges side by side and covers what the CDC does and does not say. To help, the CDC suggests placing toys a little out of reach and encouraging your baby to crawl, scoot or roll to get them.
Week by week, in the app
One thing to notice and one thing to try, for every week of the first three years. Here is what this month covers. The app works out which week your child is in from their birth date and brings each one to you on the day.
- Week 27Your baby is Standing with Support
- Week 28Your baby is Discovering Cause and Effect
- Week 29Your baby is Preparing to Crawl
- Week 30Your baby is Banging Objects Together
Read next
- When Do Babies Roll Over?Tummy to back usually comes first, at around five to six months.
- When Do Babies Start Crawling?The AAP and the NHS both put crawling at around 7 to 10 months, and MedlinePlus says babies may start crawling or scooting as early as 6 months.
- When Can Babies Start Solid Foods?The AAP recommends only breast milk for approximately 6 months, then foods alongside continued breastfeeding.
- When Do Babies Sit Up?Sitting is two separate skills on the CDC’s list, three months apart.
- Growth chart at 7 monthsThe WHO median weight, length and head size for a 7-month-old, girls and boys, with the typical range around each.
This week, for your baby
Growbaby works out which week your baby is in from their birth date and brings that week’s activity to you on the day, so you are not looking up where you are. Plus adaptive soothing for the nights and Growy for the questions in between.
Frequently asked questions
The AAP says crawling is usually mastered between seven and ten months, the NHS says around 7 to 10 months, and MedlinePlus says it may begin from 6 months. The AAP also says a few children never crawl and scoot on their bottoms or slither on their stomachs instead. The CDC does not list crawling on its milestone checklists, and says leaving a milestone out is not a reflection of its significance.
It is a genuine cognitive step rather than noise for its own sake. Bringing two things together at the midline and making something happen is cause and effect being tested, and the hundredth repetition is as informative to your baby as the first.
Not on its own, by the AAP’s account. Its test is coordination rather than style: both sides of the body working together and each arm and leg used equally. If your baby’s movement does not seem normal to you, the AAP suggests raising it with your pediatrician.
Sources
This guide is for general informational purposes only. Growbaby is not a medical device and does not provide medical advice, diagnosis or treatment. Every baby develops at their own pace; for any question or concern about your baby’s health or development, always consult your pediatrician or another qualified healthcare provider.
