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Am J Obstet Gynecol. 1988 Feb;158(2):332-4.

Gestational age and fetal biophysical assessment.

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1
Department of Obstetrics and Gynaecology, Grace Maternity Hospital, Halifax, Nova Scotia, Canada.

Abstract

With improved neonatal care, biophysical assessment to detect fetal asphyxia is used increasingly at an earlier gestational age. We have tested five fetal biophysical variables: nonstress test, fetal breathing movements, fetal movements, fetal tone, and amniotic fluid volume 11,012 times in 5582 singleton fetuses in whom there was a normal perinatal outcome. The nonstress test and fetal breathing movements were more likely to be abnormal at 26 to 33 weeks' gestation compared with 34 to 41 weeks. The nonstress test, fetal breathing movements, fetal tone, and amniotic fluid volume were more likely to be abnormal at 42 to 44 weeks' gestation compared with 37 to 41 weeks. Fetal biophysical tests should be interpreted in relation to gestational age.

PMID:
3341411
[Indexed for MEDLINE]
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