An ultra sound is defined as high frequency of sound waves. Here your pregnancy test , this high frequency of sound waves is passed through your womb (uterus) in a short period which can able to identify the inner portion of your uterus.
High frequency of sound waves bounces off the inner parts especially your baby and the sound waves are turned into a digital image which shows your baby’s present position and movements. When the sound waves bounce in hard objects such as baby’s bones the sound waves become bigger and will reflect in the image, as white. Soft tissues are become grey. Babies are lies in amniotic fluid which appear in the image as black because the sound waves easily go through the fluids.
The ultra sound tests to gives the first information about
your baby’s developments during pregnancy. Your scanning center will give a printout of the scan image. Keep in mind that purpose of the scan is not to find out your baby’s sex. It uses for a brief examination of your baby is developing normally.
Sometimes some pregnancies doctor may advice Special scans. These scans will be carried out by a fetal medicine specialist (a doctor who trained in ultrasound) otherwise ultra sound scans usually done by sonographers who are trained in ultrasound.
What is an ultrasound scan used for?
Ultra sound scans recommended during pregnancy is depending on your stages. Usually the scan will use to identify:
- Your baby’s heartbeat
- Twin pregnancy
- Ectopic pregnancy (detect the embryo implants in the fallopian tube)
- Bleeding
- Find out the accurate date of your delivery.
- Identify higher risks of your baby’s chromosomal defects including Down's syndrome particularly for older women who have higher risks of such pregnancies.(also known as nuchal translucency scan)
- Abnormal result of blood screening test
- Help with diagnostic tests, by showing the position of the baby and placenta.
- Diagnose certain abnormalities, such as spina bifida.
How is an ultrasound carried out?
If you're having a scan in early pregnancy, you'll need to drink a few glasses of water beforehand so that your uterus is pushed out of your pelvis by your bladder, giving the sonographer a good view of your baby. sonographer will put some gel on your tummy and will move a hand-held device, or transducer, over your skin to pick up images of your baby.
If your baby is still too deep in your pelvis, or if you are overweight, the images will not be very clear, so a vaginal scan may be necessary.
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