As with any other developmental milestone, crawling can happen within a certain range of time, usually between 6-10 months of age. However, every baby is different and develops at his or her own pace. Crawling might be a bit more challenging for heavier babies because of the extra body weight they have to carry, so they might take a little more time to accomplish this milestone. Also, other babies might skip crawling all together; they might find other skills more interesting and want to explore the world through other kinds of movement. This said, if you have any concerns about your little one’s physical development, you should talk to your pediatrician about it.
As your daughter learns how to sit and hold his head, she’ll start to become more curious about what’s around her. During these months your little one might give you cues that she’s ready to start crawling. Tummy time is a must during this time; if your little one enjoys it and you feel she’s getting better at it, you can also try sitting exercises. Encourage her to reach for toys she likes. Your almost crawler might start leaning forward into her arms and feel the need to change into another position (this might be all fours). She might also roll down in order to reach the object and then get back into a sitting position. This is a sign that your little one’s back, neck, arms, and trunk muscles are getting stronger and are ready to get going.
When your baby is on the floor you might see her arching her back and neck in an attempt to look around. As she practices this, she might start exploring movement by grabbing her feet or anything that’s within reach to pull and eventually roll over. As your little girl realizes that she can do this at will, she’ll start to propel forward towards the toys she wants to reach. She might position herself on all fours and just rock from side to side, but as she explores this position, she’ll come to realize that by digging with her knees and pushing off she can advance forward.
Pillows, boxes, and sofa cushions are great during play time to create obstacle courses for her to explore. This will help her improve her confidence, speed, and agility. As she keeps getting stronger and learns about these movements, she might find another alternative movement method. Some babies like scooting on their bottoms or slithering on their stomachs. As long as your little one is using each arm and leg equally there’s no need to worry.
For more information on this subject you can visit: Movement 8 to 12 Months
If you want to know more about the different styles of crawling, you can read this article.