Based on the assessment of the speech and language pathologist and an evaluation to look for other early warning signs of autism, your doctor will decide if further evaluation is necessary and may refer you to early intervention services to further help your child's development.
For further information:
 Evaluation and Management of the Child with Speech Delay, 1999, Alexander K.C. Leung and C. Ion Kao, 1999, American Family Physician
 Pediatric Primary Care: A Problem Oriented Approach, M. William Schwartz et al, 1990, Mosby, St. Louis, pp 696-700
"When to Worry if a Child Has Too Few Words," 2010, Feb 8, Perri Klass, The New York Times