My Son's Growth Has Slowed Down. What Should I Track Before His Next Doctor Visit?

By The Growth Path Editorial Team · Reviewed September 2026

The pediatrician cannot evaluate growth from a single snapshot. Come with dated measurements, puberty timeline, family heights, medications, and the actual numbers. Here is the exact checklist.

Why what you bring matters

Slow growth over 12 months is the strongest signal that something needs a closer look. But "he seems shorter than his friends" is not information the pediatrician can act on. Dated measurements, puberty signs with dates, and a family-height picture are what turn a worry into a workup.

The exact checklist

1. Dated height measurements

• Ideally the last 6-12 months of at-home measurements.
• Same time of day (morning is best).
• Same method: bare feet, back against wall, book flat on head, marked and measured.
• Recorded in a phone note, spreadsheet, or paper log with dates.

If you do not have measurements, look at his last two well-child visits and note the heights and dates from those.

2. Weight

• Current weight.
• Any recent unintentional loss or plateau.
• Weight percentile trend if available from the pediatric records.

3. Both parents' heights

• Mom's actual height (not what her driver's license says).
• Dad's actual height.
• Grandparents' heights if you know them (grandparents inform the family variance).

4. Puberty timeline

• Any voice changes and when.
• Body hair development and when.
• Shoe size increases (how many sizes in the last year).
• Growth spurt-like periods, even if not currently.
• For girls: menstrual history if applicable.

5. Medications and supplements

• Any daily prescription, especially: stimulants (ADHD meds), corticosteroids (asthma, eczema), certain anti-seizure medications.
• Any daily supplement or over-the-counter product.

6. Nutrition and eating patterns

• Typical daily intake (rough sketch, not a food journal).
• Any food avoidances or picky patterns.
• Recent changes in appetite.

7. Sleep

• How many hours per night.
• Whether he seems rested.

8. Other health notes

• Any chronic conditions: asthma, eczema, digestive issues, headaches.
• Any surgeries or hospitalizations.
• Family history of thyroid, celiac, or growth issues.

How to structure the conversation

Bring the log and the family heights on paper or on your phone. Lead with: "His growth velocity over the last 12 months looks slower than expected to me. Can we look at his growth chart together?" Ask specifically: (a) is his velocity age-appropriate, (b) is his trajectory tracking or crossing lines, (c) does his current percentile match family-height expectations. If the answers are anything other than "on track," ask what workup makes sense.

What NOT to do

• Do not start a gluten-free trial before celiac testing (it invalidates the results).
• Do not start supplements assuming a deficiency without testing.
• Do not stop a prescribed medication (like ADHD stimulants) unilaterally before talking to the prescriber.
• Do not compare him to specific classmates or siblings out loud in the visit. Percentiles and velocity are the language.

What to expect after the visit

If the pediatrician is concerned, expect basic blood work (CBC, TSH, tTG-IgA, IGF-1) and possibly a bone age x-ray. If those are normal, most kids get "watch and recheck in 6 months." If workup is abnormal, referral to pediatric endocrine is the usual next step.

Height data uses the CDC 2000 Growth Charts for boys. This page is parent education, not medical advice or diagnosis. If you have concerns about your son's growth, talk to his pediatrician, ideally with 6-12 months of measurements in hand. © 2026 The Growth Path.