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How Many Ultrasounds Do You Need During Pregnancy?
Pregnancy Ultrasound - When to Get Your First Ultrasound
Podcasting , previously known as "audioblogging", has its roots dating back to the s. With the advent of broadband Internet access and portable digital audio playback devices such as the iPod , podcasting began to catch hold in late According to one survey in , 42 million Americans above the age of 12 listen to podcasts on at least on a weekly basis. Before online music digital distribution, the MIDI format as well as the Mbone , Multicast Network was used to distribute audio and video files. The MBone was a multicast network over the Internet used primarily by educational and research institutes, but there were audio talk programs.
Ultrasound Scan at 10 Weeks of Pregnancy
Radiation is used in medicine, to generate electricity, to make food last longer, to sterilize equipment, for carbon dating of archeological finds, and many other reasons. Ionizing radiation happens when the atomic nucleus of an unstable atom decays and starts releasing ionizing particles. When these particles come into contact with organic material, such as human tissue, they will damage them if levels are high enough, in a short period of time. This can lead to burns, problems with the blood, gastrointestinal system, cardiovascular and central nervous system , cancer , and sometimes death. If an accident happens, for example, the earthquake in Fukushima, Japan, in , or the explosion at Chernobyl, Ukraine in , radiation can become dangerous.