Q: My two-year-old won't talk. When do I worry? His 13-year-old half brother has autism. Help!
A: Any child who is two and does not talk should be evaluated for a language delay. Because autism does run in families, it is particularly important since delayed or atypical language development is part of the autism spectrum disorder. In general, two-year-olds should have at least 50 vocabulary words and speak in two-word sentences. Talk to your child's doctor about getting a hearing test and a referral to a speech and language specialist.