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| Normal Anthropometric values at birth |
Anthropometry formula for expected parameters in pediatrics
Normal Anthropometric Values at Birth
Parameter
|
Range
|
Normal for easy memory
|
Weight
|
2.5-3.5kg
|
3 kg
|
Length
|
45-55 cm
|
50cm
|
Head circumference
|
33-37cm
|
35cm
|
Calculate body surface area from the weight (kg)
Weech Formula for expected height from 2 years to 12 years
Sources: http://www.adsa.org.za/Portals/14/Documents/Clinical20Guideline20Anthropometry.pdf
Body Surface area = (4w+7)/(w+90) m2
Ideal weight gain
Age
|
Expected weight
|
Rate of weight gain g/day
|
Up to 4 months
|
3-6kg
|
30g/day
|
4-8 months
|
6-8kg
|
20g/day
|
8-12 months
|
8-10 kg
|
15g/day
|
Age
|
Rate of weight gain g/week
|
3 months
|
200 g/week
|
4 – 6 months
|
150 g/week
|
7 – 9 months
|
100 g/week
|
10 – 12 months
|
50 – 75 g/week
|
1 – 2 years
|
40 g/week
|
2 - puberty
|
30 g/week
|
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| All you need to remember for baby weight |
Age
|
Rate of weight gain
|
Up to 3 months
|
30 g/day
|
3 months to 1 year
|
400 g/month
|
3-7 years
|
2 kg/year
|
7 years to adolescence
|
3kg/year
|
The weight of any baby should multiply in the following rate
ideally
Birth Weight (x)
|
Time
|
Examples
(2.5kg ) |
2x (Doubles)
|
5 months
|
5kg
|
3x (Triples)
|
1 year
|
7.5kg
|
4x (Four Times)
|
2 years
|
10kg
|
5x (Five times)
|
3 years
|
12.5kg
|
6x (Six times)
|
5 years
|
15kg
|
7x (Seven times)
|
7 years
|
17.5kg
|
10x (Ten times)
|
10 years
|
25kg
|
Formula to calculate expected weight at certain age
Age
|
Weech Formula
|
3-12 months
|
(Age in months + 9) / 2 |
1-6 years
|
Age(years)x2 + 8
|
7-12 years
|
(Age in years X 7- 5)/2 |
Measurement and calculation of Height
Age
|
Length at birth
|
Birth
|
50cm
|
3 months
|
60cm
|
1 year
|
75cm
|
2 years
|
90cm
|
4-5 years
|
100cm
|
5 years to 10 years
|
5cm/years
|
Adolescence
|
8 cm/year for girls during 12-16 years
10cm/year for boys during 14-18 years
|
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| Expected length gain in pediatric |
Expected height = age in years x 2 + 77 cm
Rate of gain of length/ height
Age
|
Gain in length/height
|
Up to 3 months
|
3.5cm/month
|
6-9 months
|
1.5cm/month
|
9-12 months
|
1.3cm/month
|
2-5 years
|
6-8cm/year
|
5 years to 10 years
|
5cm/years
|
Adolescence
|
8 cm/year for girls during 12-16 years
10cm/year for boys during 14-18 years
|
Head Circumference
Birth
|
35 cm
|
3 Months
|
40 cm
|
1 years
|
45 cm
|
2 years
|
48cm
|
5 years
|
52cm
|
Rate of growth of Head circumference
Up to 3 months
|
2 cm/month
|
3 months – 1 year
|
2cm/ 3 months
|
1-3 years
|
1cm/ 6 month
|
3-5 year
|
1cm/ year
|
Dines formula to estimate HC at 1 years
(HC at birth(cm) + 9.5 ± 2.59)/2
Learn about abnormality in Head circumference and their causes (Microcephaly, macrocephaly).
Learn about abnormality in Head circumference and their causes (Microcephaly, macrocephaly).
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| Normal Values of Head circumference and Chest circumference |
Chest Circumference
HC > CC @ Birth by 3cm
HC = CC @ 9-12 months
HC< CC after 1 years
Mid Arm Circumference (MUAC)
Increase in first year 11cm - 16cm
1-5 years 16cm - 17cm
Sources: http://www.adsa.org.za/Portals/14/Documents/Clinical20Guideline20Anthropometry.pdf
Essential pediatrics OP Ghai
Meherban singh Clinical Methods
