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J Ultrasound Med. 2008 Jan;27(1):39-43.

Predicting macrosomia.

Author information

1
Department of Obstetrics and Gynecology, Madigan Army Medical Center, Tacoma, WA 98431, USA. jason.pates@nw.amedd.army.mil

Abstract

OBJECTIVE:

The purpose of this study was to evaluate the prediction of fetal macrosomia based on ultrasound estimates of fetal weight and amniotic fluid volume combined with clinical risk factors.

METHODS:

A retrospective cohort study of women undergoing indicated obstetric ultrasound examinations within 7 days of delivery was conducted.

RESULTS:

A total of 3115 women gave birth within 7 days of ultrasound examinations that included an estimated fetal weight (EFW) and an amniotic fluid index (AFI). Clinical risk factors were associated with an 8% positive predictive value for a birth weight of 4000 g or higher. Adding an ultrasound EFW of 4000 g or higher increased the positive predictive value to 62%. Adding an AFI of 20 cm or higher to the clinical risk factors and the ultrasound EFW further increased the positive predictive value to 71%.

CONCLUSIONS:

An ultrasound EFW of 4000 g or higher within 1 week of delivery combined with clinical risk factors and an increased AFI is associated with macrosomia at birth in 71% of cases.

PMID:
18096729
[Indexed for MEDLINE]
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