Obstetric sonogram of a fetus at 16 weeks. The bright white circle center-right is the head, which faces to the left. Features include the forehead at 10 o'clock, the left ear toward the center at 7 o'clock and the right hand covering the eyes at 9:00.
Other names
prenatal ultrasound
ICD-9-CM
88.78
MeSH
D016216
OPS-301 code
3-032, 3-05d
[edit on Wikidata]
Obstetric ultrasonography, or prenatal ultrasound, is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in the uterus (womb). The procedure is a standard part of prenatal care in many countries, as it can provide a variety of information about the health of the mother, the timing and progress of the pregnancy, and the health and development of the embryo or fetus.
The International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) recommends that pregnant women have routine obstetric ultrasounds between 18 weeks' and 22 weeks' gestational age (the anatomy scan) in order to confirm pregnancy dating, to measure the fetus so that growth abnormalities can be recognized quickly later in pregnancy, and to assess for congenital malformations and multiple pregnancies (twins, etc).[1] Additionally, the ISUOG recommends that pregnant patients who desire genetic testing have obstetric ultrasounds between 11 weeks' and 13 weeks 6 days' gestational age in countries with resources to perform them (the nuchal scan). Performing an ultrasound at this early stage of pregnancy can more accurately confirm the timing of the pregnancy, and can also assess for multiple fetuses and major congenital abnormalities at an earlier stage.[2] Research shows that routine obstetric ultrasound before 24 weeks' gestational age can significantly reduce the risk of failing to recognize multiple gestations and can improve pregnancy dating to reduce the risk of labor induction for post-dates pregnancy. There is no difference, however, in perinatal death or poor outcomes for infants.[3]
^Whitworth, M; Bricker, L; Mullan, C (2015). "Ultrasound for fetal assessment in early pregnancy". Cochrane Database of Systematic Reviews. 2015 (7): CD007058. doi:10.1002/14651858.CD007058.pub3. PMC 4084925. PMID 26171896.
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medical ultrasonography or simply sonography, or echography. The practice of examining pregnant women using ultrasound is called obstetricultrasonography, and...
both as a means of gynecologic ultrasonography and obstetricultrasonography. It is preferred over abdominal ultrasonography in the diagnosis of ectopic...
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training available to physicians in the US are: Maternal-fetal medicine: an obstetrical subspecialty, sometimes referred to as perinatology, that focuses on...
activity can be visualized and the fetal heart motion quantified by obstetricultrasonography. A study of 32 normal pregnancies showed that fetal heart motion...
examine the uterus and fetus during pregnancy; this is called obstetricultrasonography. Abdominal ultrasound is commonly used in the setting of abdominal...
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fertilization (as is possible in in vitro fertilization) or by obstetricultrasonography. Adding the estimated gestational age at childbirth to the above...
This nomenclature has been adopted by the Association of Women's Health, Obstetric and Neonatal Nurses (AWHONN), the American College of Obstetricians and...
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frequently checks the estradiol level and, by means of gynecologic ultrasonography, follicular growth. Typically approximately 10 days of injections will...
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conjunction with other features of Down syndrome, for example during obstetricultrasonography, it may be an indication for intrauterine sampling for fetal chromosome...
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