My son is seven months and five days old, and he still doesn't sit up on his own. When will he sit up? When will he start crawling?

A. Mama child learns to sit independently by the time of eight months to 9 months maximum and they learn to crawl between the time of 9 to 11 months so try to make your child support for a longer duration at a stretch so slowly the spine will gather that strength and will learn to sit independently over the period