If you are concerned with your child’s speech development it is important to mention it to their pediatrician. The following red flags are some additional signs that, if noticed with your child, may be followed up with their pediatrician:
3 - 4 months: poor head support, no babbling or infrequent noise-making, regular eye crossing, and a lack of social smiling.
4 - 7 months: overly stiff or floppy body, difficulty keeping head steady, difficulty sitting, lack of noise response/social smiling, lack of expressed affection toward caregivers, and doesn't interact with objects.
7 - 12 months: no crawling, lack of evenness while crawling (one month after starting), can't stand with assistance, lacks curiosity (especially with hiding games like peek-a-boo), speaks infrequently, and doesn't use body language.
13 - 24 months: unable to walk by 18 months, cannot make sense or use of daily objects, cannot vocalize a minimum of six words by 18 months or two-word responses by 24 months, doesn't repeat and mimic words and actions, cannot follow simple instructions, loses previously mastered skills.
3 - 5 years: speech delays (stuttering, lisping, difficulty with articulation), poor motor skills, and under-developed social/emotional skills.