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How safe is ultrasound?

Ultrasound has been used for more than 30 years and is not known to cause any harm to pregnant women or her baby. That said, ultrasound should not be routinely used unless your doctor has a specific medical reason for doing so.

How accurate is ultrasound in dating a pregnancy?

Ultrasound is extremely accurate when used during the first trimester. Measuring the baby's crown to rump length at this stage can pinpoint a baby's gestational age within 3-5 days while similar measurements taken during the other two trimesters take relatively longer. Therefore the first trimester is the preferred time to date a pregnancy.

What are the other reasons for performing a first trimester ultrasound?

  • Your doctor may order a first trimester ultrasound to
  • Pinpoint the location of the gestational sac (the developing fetus is contained within this sac), something that can be useful in
  • diagnosing an ectopic pregnancy.
  • Look for evidence of an embryo
  • Check for a fetal heartbeat
  • Find out if you are carrying more than one baby
  • Examine the uterus for structural abnormalities or other problems that could pose problems during your pregnancy
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Disclaimer: Information contained on this Web site is intended solely to make available general summarized information to the public. It should not be substituted for medical advice. It is your responsibility to consult with your pediatrician and/or health care provider before acting on any advice on this web site. While OEM endeavors to provide up-to-date and accurate information, it is not liable for any advice whatsoever rendered nor is it liable for the completeness or timeliness of any information on this site.
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