Sources & Footnotes

Every claim above is quoted or paraphrased from the following, all fetched and read on July 29, 2026. Quotation marks indicate verbatim wording from the source.

1. CDC, Learn the Signs. Act Early. — milestone checklist & tips, 2 months: cdc.gov/act-early/milestones/2-months.html; program index (all ages): cdc.gov/act-early/milestones/index.html
2. CDC — milestone checklist, 4 months: cdc.gov/act-early/milestones/4-months.html
3. CDC — milestone checklist, 6 months: cdc.gov/act-early/milestones/6-months.html
4. CDC — milestone checklist, 9 months: cdc.gov/act-early/milestones/9-months.html
5. CDC — milestone checklist, 1 year: cdc.gov/act-early/milestones/1-year.html
6. CDC — key points about the milestone checklists (75% placement; not diagnostic tools): cdc.gov/act-early/milestones/key-points.html
7. AAP / HealthyChildren.org — Milestones Matter (screening at 9, 18, 30 months; autism at 18 and 24 months): healthychildren.org — Milestones Matter
8. AAP / HealthyChildren.org — Sleeping Through the Night (good-sleeper definition; frequent waking developmentally appropriate; feeding/diaper benchmarks): healthychildren.org — Sleeping Through the Night
9. Stanford Medicine Children's Health — Common Cold in Children (6–8 colds/year; home care; when to call): stanfordchildrens.org — Common Cold in Children
10. NIH / NIDCD — Quick Statistics (ear infections: 5 of 6 children by age 3): nidcd.nih.gov — Quick Statistics
11. Mayo Clinic — Strep throat in young children: mayoclinic.org — strep throat FAQ
12. AAP / HealthyChildren.org — Head Injury in Children (minor vs serious; 24-hour observation; when to call 911): healthychildren.org — Head Injury
13. AAP / HealthyChildren.org — A Parent's Guide to Safe Sleep (back to sleep; bare crib; room-sharing ≥6 months, −50% SIDS risk; no bed-sharing; stop swaddling when trying to roll, ~3–4 months): healthychildren.org — Safe Sleep
14. Stanford Medicine Children's Health — Infant Sleep (through the night = 6–8 hours, ~3 months; drowsy-but-awake; when to talk to the doctor): stanfordchildrens.org — Infant Sleep
15. Cleveland Clinic — Sleep in Your Baby's First Year (5–6 hour stretches by 6 months; newborn sleep bursts; 12–16 hours incl. naps at 4–12 months; routine and environment tips; when to call): clevelandclinic.org — Baby Sleep First Year
16. AAP / HealthyChildren.org — Toilet Training: How to Tell When Your Child is Ready (~18 months physiological; after 2nd birthday cognitive; six readiness areas): healthychildren.org — Toilet Training Readiness
17. AAP / HealthyChildren.org — Big Kid Beds: When to Make the Switch (climbing out; transition tips): healthychildren.org — Big Kid Beds
18. AAP / HealthyChildren.org — Healthy Sleep Habits (routines; screens off ≥1 hour before bed): healthychildren.org — Healthy Sleep Habits
19. AAP / HealthyChildren.org — Starting Solid Foods (≈6 months; readiness signs; 3–5 day rule; iron & zinc; choking hazards): healthychildren.org — Starting Solid Foods
20. AAP / HealthyChildren.org — Introducing Allergens (early peanut introduction; thinned peanut butter method; no whole nuts): healthychildren.org — Introducing Allergens
21. CDC — Positive Parenting Tips: Toddlers (1–2 years): cdc.gov — toddlers 1–2; Toddlers (2–3 years): cdc.gov — toddlers 2–3
22. CDC — Positive Parenting Tips index (infants, toddlers, preschoolers; references "Essentials for Parenting Teens," ages 11–17): cdc.gov — positive parenting tips
23. CDC — When, What, and How to Introduce Solid Foods (about 6 months; not before 4 months; readiness signs; texture progression; allergenic foods with other foods; choking-safe prep for round and cylindrical foods; cook hard vegetables until fork-mashable): cdc.gov — introducing solid foods
24. CDC — Foods and Drinks to Avoid or Limit (honey before 12 months → botulism; cow's milk before 12 months → intestinal-bleeding risk; no added sugars and no caffeine under 24 months): cdc.gov — foods to avoid or limit
25. CDC — Cow's Milk and Milk Alternatives (whole milk at 12 months, not before; unflavored/unsweetened; ~2 dairy servings at 12–23 months; excess crowds out iron): cdc.gov — cow's milk
26. AAP / HealthyChildren.org — Baby Burping, Hiccups & Spit-Up (air swallowing "seen more often with the bottle"; burp every 2–3 oz bottle-fed / at breast switch when nursing; ordinary spit-up usually no cause for concern): healthychildren.org — burping & spit-up
27. AAP / HealthyChildren.org — Tongue-Tie in Babies (definition; ~4–10% of newborns; less than half with physical signs have trouble nursing; evaluate before surgery): healthychildren.org — tongue-tie
28. Mayo Clinic — Spitting up in babies: What's OK, what's not ("happy spitter"; contact-the-doctor signs incl. projectile, green/yellow fluid, blood, weight and diaper changes): mayoclinic.org — spitting up
29. AAP / HealthyChildren.org — Food Allergies in Children (symptom categories; epinephrine right away + 911 for severe reactions): healthychildren.org — food allergies
30. AAP / HealthyChildren.org — How to Care for Your Child's Cold (no OTC cough/cold meds under 4; don't work under 6; honey doses by age, none under 12 months; ibuprofen 6 months+; aspirin/Reye syndrome warning; when to call): healthychildren.org — caring for your child's cold
31. AAP / HealthyChildren.org — Acetaminophen Dosing Tables (dose by weight; oral syringe; not under 2 without doctor guidance; fever under 12 weeks needs immediate evaluation; max 5 doses/24h): healthychildren.org — acetaminophen dosing
32. Medical Discovery News (University of Texas Medical Branch) — Chicken Soup and a Cold (2000 study: mild anti-inflammatory effect inhibiting white blood cells; soup vapors raise nasal temperature, loosen mucus, ease congestion; effects modest): utmb.edu — chicken soup and a cold
33. AAP / HealthyChildren.org — Hand, Foot & Mouth Disease (under-5s; cold-like start then mouth/hand/foot blisters; worst first few days, gone within a week; no cure — fluids and comfort; call if fever >3 days or not drinking; dehydration = urgent): healthychildren.org — hand, foot & mouth
34. AAP / HealthyChildren.org — Croup in Young Children (voice-box/windpipe swelling; barky cough; stridor = "a coarse musical sound each time they breathe in"; keep child calm, fluids; 911/ER signs incl. stridor at rest, bluish lips, drooling/trouble swallowing): healthychildren.org — croup