Growth & Development Flashcards
When does average newborn regain birthweight?
3rd week
When does birthweight double?
5 months
When does birthweight triple?
1 year
Infant younger than 3 weeks who hasn’t regained birthweight…
Reassure and re-evaluate in 1 week
Average infant height (50%)?
50cm
Birth length goes up 50% by age…?
1
Birth length is doubled by…?
4
Birth length is tripled by…?
13
Growth rate first year of life?
20 cm/year
Birth size reflection of?
Maternal factors and in utero conditions (vs. genetic growth potential)
Infant can cross percentiles in 1st 12-18 months as genetic, hormonal, and environmental factors overcome maternal ones
When are you half your adult height?
2
When do you worry about abnormality of growth?
Shifts across 2+ percentile lines on growth curve after 2
What has significant effect on linear growth velocity?
Chronic diseases
Normal head circumference at birth for full term newborn?
35cm
Normal head growth for first 6 months?
~1 cm/month
Normal head growth from 6-12 months?
~1/2 cm/month
Head circumference above 98 percentile for age?
Macrocephaly
Infant with increasing head circumference, but normal development…?
Measure parents’ heads- Normal familial macrocephaly
Is hydrocephaly present at birth?
Can be, doesn’t have to be
Signs of hydrocephaly
Irritability, lethargy, poor appetite, persistent vomiting, bulging fontanelle, neurological findings in infant with rapidly enlarging head
Normal development, no signs increased ICP, parents with big heads
Macrocephaly
Irritability, vomiting, bulging fontanelle, impaired upward gaze
Hydrocephaly
Which is scary… Large anterior fontanelle v. Bulging fontanelle?
Bulging…associated with increased ICP
Is a bulging fontanelle associated with papilledema?
No ( it’s chronic, not acute)