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THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Medical Information--Home Edition
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Introduction

There is no formal or universally accepted definition of a "high-risk" pregnancy. Generally, however, a high-risk pregnancy involves at least one of the following: The woman or baby is more likely to become ill or die than usual, or complications before or after delivery are more likely to occur than usual.

Certain conditions or characteristics, called risk factors, make a pregnancy high risk. Doctors identify these factors and use a scoring system to determine the degree of risk for a particular woman. Identifying high-risk pregnancies ensures that women who most need medical care receive it.

Last full review/revision February 2003

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