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Stages of Prematurity
Every step of the way

Measuring Prematurity
How Common is Prematurity
Frequently Asked Questions


How Common is Prematurity?

Prematurity is common, but extreme prematurity (less than 31 weeks gestation) is not. The table below indicates the incidence of prematurity*

Gestational Age of Births in the United States in 1997

Gestational Age (weeks) Births Percent
42 or more (Past Term) 302,541

7.9%

37-41 (Term) 3,103,295

80.8%

36 (Preterm) 157,965

4.1%

32-35 204,232

5.3%

28-31 46,398

1.2%

27 or less 28,005

0.7%

*Data from 1997 as found in the National Vital Statistics Report (Vol. 47, No. 18), April 29, 1999.

How premature is my baby?

Your baby's doctor can usually assess the degree of prematurity by a review of the mother's medical records and an exam of your baby. The degree of prematurity determines the risk of complications. Infants who are born at only slightly less than 37 weeks gestation are likely to have feeding problems that will delay their discharge from the hospital, but they should do well. Babies born at less than 28 weeks gestation are likely to have more serious problems which prolong their discharge and may influence their long-term outcome. Ask your doctor to explain the risks your baby faces.

 

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