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The 1985 maximum power allowed by the U.S. Food and Drug Administration (FDA) of 180 milliwatts per square cm [25] is well under the levels used in therapeutic ultrasound, but still higher than the 30–80 milliwatts per square cm range of the Statison V veterinary LIPUS device.
Typical diagnostic ultrasound machines operate in the frequency range of 2-18 megahertz, whereas home ultrasound machines and therapeutic ultrasound machines operate in the frequency range of .7-3.3 megahertz. Diagnostic sonography is typically used to create an audio "image", such as during pregnancy to visualize the developing baby.
Ultrasound is sound with frequencies greater than 20 kilohertz. [1] This frequency is the approximate upper audible limit of human hearing in healthy young adults. The physical principles of acoustic waves apply to any frequency range, including ultrasound. Ultrasonic devices operate with frequencies from 20 kHz up to several gigahertz.
The custom of dowry is most common in cultures that are strongly patrilineal and that expect women to reside with or near their husband's family (patrilocality). [ 143 ] Kirti Singh states that dowry is widely considered to be both a cause and a consequence of son preference, and this may lead to girls being unwanted, sex selective abortion ...
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
A gender reveal party is a party held during pregnancy to reveal the baby's sex to the expectant parents' family and friends, and sometimes to the parents themselves. Prenatal sex discernment technology furnishes the necessary information. [1] [2] The practice originated in the United States during the late 2000s. [2]
World map of birth sex ratios, 2012 The one child policy in China has contributed to the imbalanced sex ratios. Image shows a community bulletin board in Nonguang Village, Sichuan province, China, keeping track of the town's female population, listing recent births by name and noting that several thousand yuan of fines for unauthorized births remain unpaid from the previous year.
A CPC in Lincoln, Nebraska (foreground) intentionally located across the street [1] from an abortion clinic (background). A crisis pregnancy center (CPC), sometimes called a pregnancy resource center (PRC) [2] or a pro-life pregnancy center, [3] [4] is a type of nonprofit organization established by anti-abortion groups primarily to persuade pregnant women not to have an abortion.
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