Obstetric ultrasonography is an important and common part of obstetric care in the United States.The purpose of this document is to present information and evidence regarding the methodology of, indications for, benefits of, and risks associated with obstetric ultrasonography in specific clinical situations.
To this end each word and phrase in the ESV has been carefully weighed against the original Hebrew, Aramaic, and Greek, to ensure the fullest accuracy and clarity and to avoid under-translating or overlooking any nuance of the original text.
The words and phrases themselves grow out of the Tyndale-King James legacy, and most recently out of the RSV, with the 1971 RSV text providing the starting point for our work.
The necessary components of fetal anatomy in a standard examination are listed in Box 1 and commonly can be obtained after approximately 18 weeks of gestation, although it may be possible to document normal structures before this time.
Sometimes structures can be difficult to visualize because of fetal size, position, and movement; maternal abdominal scars; increased maternal abdominal wall thickness; and reduced amniotic fluid volume.
When technical limitations result in suboptimal images, the nature of the limitations should be documented in the report; a follow-up examination should be considered.
*A measurement of the nuchal fold may be helpful during a specific gestational age interval to assess the risk of aneuploidy. ACR-ACOG-AIUM-SRU Practice parameter for the performance of obstetrical ultrasound.
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The American College of Obstetricians and Gynecologists, the American College of Radiology, the American Institute of Ultrasound in Medicine, the National Institute of Child Health and Human Development, the Society for Maternal–Fetal Medicine, and the Society of Radiologists in Ultrasound have adopted the following uniform terminology for the performance of ultrasonography in the second trimester and the third trimester: standard, limited, and specialized ( A standard obstetric ultrasound examination includes an evaluation of fetal presentation and number, amniotic fluid volume, cardiac activity, placental position, fetal biometry, and an anatomic survey.
The maternal cervix and adnexa should be examined as clinically appropriate and when technically feasible.
Requests for authorization to make photocopies should be directed to Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400. American College of Obstetricians and Gynecologists. Real-time ultrasonography is necessary to confirm fetal viability through observation of cardiac activity and active fetal movement.