My daughter completed 8th month on 20th Jan. she is still not crawling. But rolling a lot. sometimes crawling that too if any item is close to her and then she slowly tries to crawl. I'm worried. please advice

A. Crawling and happen any time after completing the time of 9 to 10 months so basically the idea about 9 to 10 months when you can expect your child to learn to crawl and down so you can easily wait for that as of now