Physical Growth (1-3 Years)
Weight Development
- Average weight gain: 1.8 to 2.7 kg/year.
- Average weight at 2 years: 12 kg.
- Birth weight is quadrupled by 2.5 years (30 months).
Formula (>1 yr): Age(yrs) × 2 + 8 = Kg
Height Development
- Growth focuses on leg elongation rather than the trunk.
- Annual Increase: 10 to 12.5 cm.
- Adult height is roughly twice the 2-year-old height (86.6 cm).
Formula (>1 yr): Age(yrs) × 5 + 80 = cm
Head & Chest
- Brain reaches 90% adult size by end of year 2.
- Anterior fontanel closes between 12–18 months.
- Chest circumference exceeds head size.
Teething
- 24 Months: 16 primary teeth.
- 30 Months: 20 primary teeth.
Vitals
- Pulse: 80-130 beats/min (Avg: 110).
- Respiration: 20-30 breaths/min.
- Toddlers appear "pot-bellied" due to immature abdominal muscles.
Maturation of Systems
Anatomical Vulnerabilities
The ear and throat structures are short and straight, and lymphoid tissue remains large.
- High risk for Otitis Media.
- High risk for Tonsillitis.
- High risk for Upper Respiratory Infections.
Digestive Maturation
- Processes are fairly complete; stomach capacity allows for 3 meals a day.
- Gastric Acidity continues to increase, destroying bacteria.
- Voluntary elimination control is achieved.
Motor Development Milestones
15 to 18 Months
Gross Motor
- Walks alone independently (15 mo).
- Creeps upstairs on hands and knees.
- Runs faster (often falls) & Jumps in place (18 mo).
- Throws ball overhand without falling.
Fine Motor
- Holds two cubes in one hand (15 mo).
- Removes simple clothes like shoes (18 mo).
- Holds cup with both hands & eats with spoon.
24 to 30 Months
Gross Motor
- Goes up/down stairs, two feet per step (24 mo).
- Kicks ball forward without overbalancing.
- Jumps from chair, stands on one foot (30 mo).
Fine Motor
- Opens door by turning doorknob (24 mo).
- Aligns cubes like a train (24 mo).
- Holds crayon with fingers rather than fist (30 mo).
Common Behavioral Problems
Temper Tantrums
- Includes kicking, screaming, and breath-holding tactics.
- Stems from a drive for autonomy and a lack of motor/cognitive skills.
- Management: Consistent expectations, prioritize rules, and use reasonable consequences.
Negativism
- Persistent negative response ("no") is a necessary assertion of self-control, not insolence.
- Management: Reduce opportunities for a "no" answer.
- Say "I am going to listen to your heart" instead of asking "Can I?" to prevent mistrust.
Regression
- Retreating to past levels of behavior during stress to conserve psychic energy.
- Common because stress hinders mastery of new tasks.
- Management: Ignore regression while praising existing appropriate behavior.
Nutrition, Sleep & Dental Care
Nutrition & Feeding
- Needs 1300 calories/day; high protein (13g/day) needed for muscle/activity.
- At ~18 months, physiologic anorexia occurs (decreased appetite).
- Toddlers become picky, fussy eaters with strong preferences.
- Require 3 meals & 2 snacks daily.
Sleep & Toilet Training
- Sleep averages 11 to 12 hours a day; prone to bedtime resistance.
- Toilet training requires voluntary sphincter control, typically achieved between 18 and 24 months.
- AAPD recommends an oral health exam by 6 months of age or within 6 months of the first tooth eruption.
Safety & Injuries
🚗 Motor Vehicles
Primary cause of accidental death (ages 1-4).
- Unrestrained children in the front seat are at highest risk.
- Improper use of restraints causes many fatalities.
🌊 Drowning
Ages 12-36 months at highest risk.
- Infant drowning most commonly occurs in the bathtub.
- Swimming lessons are not sufficient protection alone.
🔥 Burns
- Kitchen Hazards: Pulling pots with hot liquids, oil, and grease.
- Use guards for radiators and fireplaces.
- Sunburns are a year-round concern.
💊 Poisoning
- Risk due to mouthing objects and opening "childproof" containers.
- Can cause severe morbidity like esophageal strictures.
🩹 Falls
- Playground injuries are common.
- Use passive prevention (sand/wood chips) under equipment.
🌭 Choking
- Difficulty with large foods (hot dogs) and hard foods (nuts).
- Cannot discard pits or bones; careful food selection required.