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picture of a baby (fetus) in the uterus. Because it uses sound waves instead of radiation, ultrasound is safer than X-rays. Ultrasound provides important information about the health of the fetus and ...
www.marchofdimes.com/professionals/14332_1167.asp
Upside: Detailed explanation of ultrasounds including how it works and what it is used for during pregnancy
Downside: Small, light color font
Ultrasound imaging, also known as sonography, uses inaudible sound waves to produce images of the different structures in your body. During an ultrasound examination, a small, hand-held device called ...
https://www.asrt.org/content/ThePublic/AboutRadiologicProcedures/UltrasoundDuringPregnancy.aspx
Upside: Details ultrasounds procedure
Downside: No information about interpreting results
An ultrasound exam is a procedure that uses high-frequency sound waves to scan a woman's abdomen and pelvic cavity, creating a picture (sonogram) of the baby and placenta. Although the terms ...
www.americanpregnancy.org/prenataltesting/ultrasound.html
Upside: Very good overview of different types of ultrasounds and answers common questions about them
Downside: Limited links for additional depth
A pregnancy ultrasound is a method of seeing the fetus and female pelvic organs during pregnancy. The ultrasound machine sends out high-frequency sound waves. These waves bounce off body structures ...
www.healthline.com/adamcontent/pregnancy-ultrasound
Upside: Very good overview of ultrasounds including how performed, preparation, risks and more
Downside: Cluttered page
When Is an Ultrasound Performed During Pregnancy? A prenatal ultrasound test uses high-frequency sound waves, inaudible to the human ear, that are transmitted through the abdomen via a device called ...
www.webmd.com/baby/guide/ultrasound
Upside: Article with very detailed discussion on different types of ultrasounds, when they happen and includes 3-D and 4-D ultrasound
Downside: None
Fetal ultrasound is a test done during pregnancy that uses reflected sound waves to produce a picture of a fetus, the organ that nourishes the fetus (placenta), and the liquid that surrounds the ...
www.webmd.com/baby/fetal-ultrasound
Upside: Article with very detailed discussion on fetal ultrasounds, timing and
Downside: Article spans several pages
Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) ...
en.wikipedia.org/wiki/Ultrasound
Upside: Excellent user-compiled detail on ultrasounds including
some pregnancy-related information and pictures
Downside: None
What is a Doppler flow study? Doppler flow is a type of ultrasound that uses sound waves to measure the flow of blood through a blood vessel. Waveforms of the blood flow are shown on the ultrasound ...
www.chop.edu/consumer/your_child/condition_section_index.jsp?id=-8946
Upside: Good explanation of doppler flow studies during pregnancy
Downside: None
Definition A pregnancy ultrasound is a method of seeing the fetus and female pelvic organs during pregnancy. The ultrasound machine sends out high-frequency sound waves. These waves bounce off body ...
www.drkoop.com/ency/93/003778.html
Upside: Good information and helpful pictures about ultrasounds
Downside: Busy page
* Overview * Risks * Results Definition: A pregnancy ultrasound is a method of seeing the fetus and female pelvic organs during pregnancy. The ultrasound machine sends out high-frequency sound waves. ...
www.umm.edu/ency/article/003778.htm
Upside: Overview and pictures of ultrasounds including what to expect from an ultrasound
Downside: None