Medical student teaching 0-3y – Video Archives Newborn Primitive Reflexes 6 Weeks Old 3 Months Old Warning Signs of SMA 5 – 6 Months 8 – 9 Months 8 – 9 Months – Describe what you see 12 Months 18 Months 2 years old 2 years old – Describe what you see 3 years old