KM,
I must respectfully disagree. Loss of words in a toddler IS a red flag. Early intervention can make a huge difference in an autistic child's life, and I encourage parents with questions to pursue evaluation by a specialist who is qualified to diagnose autism spectrum disorders. I see two flags here- one is the vocabulary loss and the other is possible hypotonia/motor skill delays. This child may not have a problem, but I don't want to discourage others from seeking help by claiming that it is nothing to worry about.
http://www.autismspeaks.org/whatisit/learnsigns.phpbest wishes-
