Is it normal for babies to skip milestones? my 7mo is army crawling but just started pulling up on things. seems he should have mastered crawling 1st.

Normal: Some babies never crawl and go directly to cruising and walking. This is totally normal. :)

Crawling is the most: variable gross motor milestone, moreso since infants are now placed on their backs for sleep. More infants with neurodevelopmental disorders skip crawling than typically-developing infants, but it happens in both. Your pediatrician & OT/PT at your state's Early Intervention Program can check muscle tone, strength, reflexes, & pattern of movement. Developmental screens are on firstsigns.org