Child Development Red Flags: When to Seek Evaluation
Important Note: This guide is for educational purposes. Only a qualified healthcare professional can diagnose developmental conditions. If you have concerns about your child’s development, contact your pediatrician. Early intervention is consistently associated with better outcomes, when in doubt, seek evaluation.
The purpose of this guide is not to alarm parents but to empower them. Fathers who know what to watch for are better positioned to advocate for early evaluation and intervention when needed. Early identification of developmental differences leads to earlier support, which leads to better outcomes across virtually every condition.
How to Use This Guide
Red flags are indicators that warrant professional evaluation, not diagnoses. Many children who show one or two red flags develop typically. The presence of multiple red flags, or any of the “always evaluate” indicators, warrants prompt contact with your pediatrician.
Trust your instincts. If something feels off about your child’s development, say so to your pediatrician. You know your child better than anyone.
Always Evaluate Immediately (Any Age)
These are absolute red flags that warrant immediate evaluation regardless of age:
- Loss of previously acquired skills: Any regression in language, motor, or social skills that is not explained by illness or stress
- No response to name by 12 months
- No babbling by 12 months
- No single words by 16 months
- No two-word phrases by 24 months
- Any loss of language skills at any age
Birth to 3 Months
Motor Red Flags
- Does not startle to loud sounds
- Does not follow moving objects with eyes by 2 months
- Does not bring hands to mouth
- Cannot hold head up briefly when on tummy by 3 months
- Hands consistently fisted after 3 months
Social/Communication Red Flags
- Does not smile at people by 2 months
- Does not make eye contact
- Does not respond to familiar voices
- Does not coo or make sounds by 3 months
4-6 Months
Motor Red Flags
- Does not reach for objects
- Does not bear weight on legs when supported
- Does not roll in either direction by 6 months
- Head consistently falls back when pulled to sitting
Social/Communication Red Flags
- Does not laugh or squeal
- Does not respond to sounds
- Does not reach for people
- Does not show affection to familiar caregivers
7-12 Months
Motor Red Flags
- Does not sit without support by 9 months
- Does not crawl by 12 months (note: some children skip crawling, this alone is not a red flag, but combined with other concerns warrants evaluation)
- Does not pull to stand by 12 months
- Does not use pincer grasp (thumb and forefinger) by 12 months
Social/Communication Red Flags
- Does not respond to name by 9 months
- Does not babble (consonant-vowel combinations like “ba,” “da,” “ma”) by 9 months
- Does not point, wave, or use other gestures by 12 months
- Does not show objects to others by 12 months
- Does not look where others point
- No back-and-forth communication (taking turns vocalizing)
12-18 Months
Motor Red Flags
- Not walking by 15 months (evaluate; not walking by 18 months requires prompt evaluation)
- Significant asymmetry in movement (using one side much more than the other)
- Persistent toe-walking
Social/Communication Red Flags
- No single words by 16 months
- Does not point to show interest (not just to request)
- Does not follow simple one-step directions
- Does not imitate actions or words
- Limited eye contact
- Does not show interest in other children
18-24 Months
Motor Red Flags
- Not walking independently by 18 months
- Cannot walk up stairs with support by 24 months
- Significant clumsiness or frequent falling
Social/Communication Red Flags
- Fewer than 6 words by 18 months
- No two-word phrases by 24 months
- Does not point to pictures in books when named
- Does not engage in simple pretend play by 24 months
- Does not follow two-step directions
- Loss of any previously acquired language
Autism Spectrum Disorder Indicators (18-24 months)
The following cluster of behaviors warrants evaluation for ASD:
- Limited or no eye contact
- Does not respond to name consistently
- Does not point to share interest (only to request)
- Limited imitation of others
- Repetitive movements (hand-flapping, rocking, spinning)
- Unusual attachment to objects
- Significant distress at routine changes
- Limited pretend play
- Unusual sensory responses (extreme sensitivity or seeking)
2-3 Years
Language Red Flags
- Fewer than 50 words by 24 months
- No two-word combinations by 24 months
- Speech that is not understood by familiar adults (by 24 months, 50% of speech should be understandable; by 36 months, 75%)
- Does not use pronouns (I, me, you) by 30 months
- Does not ask questions by 36 months
Social/Behavioral Red Flags
- Does not engage in parallel play with other children
- Does not show interest in other children
- Significant tantrums beyond what is developmentally typical
- Extreme rigidity about routines
- Significant sleep difficulties beyond typical toddler sleep challenges
Motor Red Flags
- Cannot run by 24 months
- Cannot kick a ball by 24 months
- Cannot jump by 30 months
- Significant difficulty with fine motor tasks (holding a crayon, stacking blocks)
3-5 Years
Language Red Flags
- Speech not understood by strangers (by 4 years, 100% of speech should be understandable)
- Significant stuttering that is not improving
- Does not use sentences of 4+ words by 4 years
- Cannot tell a simple story by 5 years
- Significant difficulty following multi-step directions
Social/Behavioral Red Flags
- Does not engage in cooperative play with peers
- Cannot separate from parents without extreme distress (beyond typical separation anxiety)
- Significant aggression toward peers
- Cannot follow classroom rules
- Extreme difficulty with transitions
Cognitive Red Flags
- Cannot identify colors by 4 years
- Cannot count to 10 by 5 years
- Cannot recognize own name in print by 5 years
- Significant difficulty with puzzles or shape sorting
5-8 Years (School Age)
Academic Red Flags
- Significant difficulty learning letter-sound relationships by end of kindergarten
- Cannot read simple words by end of first grade
- Significant difficulty with basic math concepts by end of first grade
- Reverses letters and numbers persistently beyond second grade
- Significant difficulty with handwriting
Attention and Executive Function Red Flags
- Cannot sustain attention for age-appropriate tasks
- Significant difficulty following multi-step instructions
- Extreme impulsivity that interferes with learning and relationships
- Significant difficulty with organization and planning
- These concerns are more significant when they occur across settings (home AND school)
Social/Emotional Red Flags
- Persistent difficulty making or keeping friends
- Significant anxiety that interferes with daily functioning
- Persistent sadness or withdrawal
- Significant behavioral problems at school
What to Do When You Have Concerns
Step 1: Document Your Observations
Before contacting your pediatrician, document:
- Specific behaviors you are concerned about
- When you first noticed them
- How frequently they occur
- Whether they occur in multiple settings
Step 2: Contact Your Pediatrician
Describe your concerns specifically. “I’m worried about his development” is less actionable than “He’s 18 months old and has fewer than 5 words, doesn’t point to show me things, and doesn’t respond consistently to his name.”
Step 3: Request Evaluation
If your pediatrician does not share your concern but you remain worried, you have the right to request a referral for developmental evaluation. You can also contact your state’s early intervention program directly (for children under 3) or your school district (for children 3 and older), these evaluations are free and do not require a physician referral.
Step 4: Early Intervention
For children under 3, early intervention services are available through the Individuals with Disabilities Education Act (IDEA). These services are free and provided in the child’s natural environment (home, childcare). Contact your state’s early intervention program at the first sign of concern, there is no downside to early evaluation.
For children 3 and older, contact your local school district’s special education department. They are required by law to evaluate children with suspected developmental disabilities at no cost to the family.
Resources
- CDC’s “Learn the Signs. Act Early.” program: cdc.gov/actearly
- First Signs (firstsigns.org): Resources for early identification of autism and related disorders
- ASHA (asha.org): American Speech-Language-Hearing Association, find a speech-language pathologist
- Zero to Three (zerotothree.org): Resources for infant and toddler development
Early identification is not about labeling children. It is about getting them the support they need, when they need it most, to reach their full potential. A father who advocates for early evaluation when he has concerns is doing one of the most important things he can do for his child.