 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. Obstetric sonography (ultrasonography) is the application of medical ultrasonography to obstetrics, in which ultrasound is used to visualize the embryo or fetus in its mother's uterus (womb). The procedure is often a standard part of prenatal care, as it yields a variety of information regarding the health of the mother and of the fetus, as well as regarding the progress of the pregnancy. Image File history File links Obsteric ultrasonograph of a healthy female at 16 weeks. ...
Image File history File links Obsteric ultrasonograph of a healthy female at 16 weeks. ...
Medical ultrasonography (sonography) is an ultrasound-based diagnostic imaging technique used to visualize muscles and internal organs, their size, structures and possible pathologies or lesions. ...
This does not cite its references or sources. ...
It has been suggested that embryology be merged into this article or section. ...
Human fetus at eight weeks. ...
The uterus or womb is the major female reproductive organ of most mammals, including humans. ...
Prenatal means before birth (is widely used in biology). ...
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{pd} File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
Fetal Sex Determination The sex of the baby can usually be determined by ultrasound at any time after 16 weeks, often at the dating scan around 20 weeks into the pregnancy depending upon the quality of the sonographic machine and skill of the operator. This is also the best time to have an ultrasound done as most infants are the same size at this stage of development. Depending on the skill of the sonographer, ultrasound may suffer from a high rate of false negatives and false positives. This means care has to be taken in interpreting the accuracy of the scan. This article or section does not cite its references or sources. ...
 Embryo at 14 weeks (profile) Image File history File links Embryo_at_14_weeks_profile. ...
Image File history File links Embryo_at_14_weeks_profile. ...
Abnormality Screening In some countries, routine pregnancy ultrasound scans are performed to detect developmental defects before birth. This includes checking the status of the limbs and vital organs, as well as (sometimes) specific tests for abnormalities. Some abnormalities detected by ultrasound can be addressed by medical treatment in utero or by perinatal care, though indications of other abnormalities can lead to a decision regarding abortion. A pregnant woman near the end of her term Pregnancy is the carrying of one or more embryos or fetuses by female mammals, including humans, inside their bodies. ...
Perinatal defines the period occurring around the time of birth (5 months before and 1 month after). ...
Perhaps the most common such test uses a measurement of the nuchal translucency thickness ("NT-test", or "Nuchal Scan"). Although 91% of fetuses affected by Down syndrome exhibit this defect, 5% of fetuses flagged by the test are in fact normal. Late in the first trimester, an echolucent area can be identified at the back of the neck of normal fetuses. ...
Role in Technology Advancement Obstetric ultrasound has played a significant role in the development of diagnostic ultrasound technology in general. Much of the technological advances in diagnostic ultrasound technology are due to the drive to create better obstetric ultrasound equipment. Acuson Corporation's pioneering work on the development of Coherent Image Formation helped shape the development of diagnostic ultrasound equipment as a whole. Acuson Corporation is a sonography equipment company specializing in obstetric ultrasounds. ...
Safety issues Current evidence indicates that diagnostic ultrasound is safe for the unborn child, unlike radiographs, which employ ionizing radiation. However, no randomized controlled trials have been undertaken to test the safety of the technology, and thus ultrasound procedures are generally not done repeatedly unless medically called for. Radiography is the creation of radiographs, photographs made by exposing a photographic film or other image receptor to X-rays. ...
Radiation hazard symbol. ...
A randomized controlled trial (RCT) is a form of clinical trial, or scientific procedure used in the testing of the efficacy of medicines or medical procedures. ...
In November 2005, actor Tom Cruise purchased an ultrasound machine for personal use at home, presumably to image the pregnancy of his wife Katie Holmes. For the reasons given above, this action received some criticism in the press from groups including the American Institute of Ultrasound in Medicine. Tom Cruise (born Thomas Cruise Mapother IV on July 3, 1962) is an Academy Award-nominated, Golden Globe Award-winning American actor and film producer. ...
Kate Noelle Katie Holmes (born December 18, 1978) is an American actress who first achieved fame for her role as Joey Potter on The WB teen drama Dawsons Creek from 1998 to 2003. ...
August 2006: A new study on rodent fetus brains that are exposed to ultrasound showed signs of damage. Speculation on human fetuses can be in a range of no significant complications to variety of mental and brain disorder. The study shows that rodent brain cells failed to grow to their proper position and remained scattered in incorrect parts of the brain.
External links
References - "AIUM discourages the sale and use of ultrasound equipment for personal use in the home" Category: MRI/PET/Ultrasound News, Medical News Today, 30 NOV 2005
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