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 Release 22.0, Sept. 2008
 
The Medical Algorithms Project
Chapter : ch44. Pediatrics Section : Assessment of Neonatal Well-Being and Development
  Terms Used to Classify a Premature Infant

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Copyright (c) 2008-2010, Institute for Algorithmic Medicine, Houston, TX, USA. All rights reserved.

Overview :

A premature infant may be classifed based on weight and gestational age at birth.

 

Measures:

(1) absolute birthweight

(2) weeks gestation

(3) percent birthweight for gestational age

 

Birth Weight in Grams

Term

< 1,000 grams

extremely low birth weight

1,000 - 1,499

very low birth weight

1,500 - 2,499

low birth weight

 

where:

• According to Conry, the mean birth weight at 35 weeks is 2,500 grams and at 37 weeks is 2,870 grams.

 

Weeks Gestation

Term

< 38 weeks

preterm

38 - 42 weeks

term

> 42 weeks

post-term

 

 

Percent Birth Weight for Gestational Age

Term

< 10%

small for gestational age (SGA)

10 - 90%

appropriate for gestationl age (AGA)

> 90%

large for gestational age (LGA)

 

  References:

A.S.P.E.N. Board of Directors and the Clinical Guidelines Task Force. Guidelines for the use of parenteral and enteral nutrition in adult and pediatric patients. JPEN (J Parenteral Enteral Nutrition). 2002; 26 Supplement: 46SA (Table 1).

Conry JA. Chapter 26: Normal labor. pages 385-413. IN: Niswander KR, Evans AT. Manual of Obstetrics, Fifth Edition. Little, Brown and Company. 1996.

 

 
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