Gary Poster, with essential assists from Galyn Norwood, Phiroon Phihakendr, Jose Quijada, Pavandeep Kalra. I am the mother of three girls and my older two started walking by 9 or 10 months. Most babies begin crawling by 9 months of age, and around 50 percent of babies start walking by the time they're 1 year old. There are many factors that influence the age at which babies begin to crawl and walk. First is the temperament of the baby.
Mellow babies are more content looking and playing rather than getting up and going.
These babies approach changes in motor milestones more cautiously. Late crawlers and walkers tend to be less accident-prone. Babies with more impulsive motor-driven temperaments, on the other hand, often race through motor milestones and crawl and walk before parents can get their cameras ready. There's absolutely no advantage to early motor developments, since these babies tend to be more accident-prone. Concerning motor development, progression is more important than timing.