Pediatrics - General Info

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Neonate ( <28days )

• Early (less than equal to 7)
• Late (8 - 28 days)

Term Baby : 37 - 42 weeks

PreTerm Baby: before 37 weeks completed

PostTerm Baby : >42 weeks completed

Normal birth weight : 2.5 - 4 kg

Low Birth weight (LBW) : <2.5 kg   (Can be Preterm or Short for date babies)

Very LBW : <1.5 kg ------- PreTerm babies
Extremely LBW : <1 kg----  PreTerm babies

Appropriate for gestational age (AGA) - between 1oth - 90th percentile
Short for GA (SGA) : <10th percentile
Large for GA (LGA) : >90th percentile

Macrosomia : Birth weight greater than equal to 4 kg

Term Baby Length - 50 cm

Head Circumference (HC) - 35 cm
HC > CC at birth (but not greater than equal to 3 cm difference) (CC = Chest Circumference)
If difference > 3 cm : Hydrocephalus , Asymmetric IUGR
CC exceeds HC by 1year.

Upper Segment (Head to Pubic Symphysis) : Lower Segment (Total Length - Upper segment) = 1.7-1.9 : 1
US : LS = 1 : 1 at approx. 7 years.

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CONSTITUTIONAL is

• Most common cause of LGA
• Most common cause of Short stature
• Most common cause of Delayed Puberty

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