Ultrasound is a prenatal test that is offered to most pregnant women. This pregnancy scan uses sound waves to generate the picture of the baby inside the womb. Ultrasound is statutory for expecting mothers as it is the only diagnostic modality to measure the development of the fetus. Women with low-risk, complication-free pregnancies will typically have at least two ultrasounds, while older moms and those with complications will usually have more.
 
There are many reasons ultrasounds in general are necessary during pregnancy, depending on the trimester, including:

Types of Ultrasound Examinations

Transabdominal Ultrasound

The most common type of prenatal ultrasound, it involves applying gel on the mother's abdomen and using a handheld device (transducer) to capture images by moving it over the belly. This method is generally used for routine prenatal screening and monitoring.

Transvaginal Ultrasound (TVS)

This ultrasound is conducted through the vaginal opening. The expecting mother lies on her back on the examination table and a thin transducer is inserted into the vagina to study the condition of the birth canal.

Doppler Ultrasound

Doppler ultrasound uses sound waves to assess the blood flow the fetus, placenta, or umbilical cord. It helps evaluate fetal well-being and detect any abnormalities in blood circulation.

3D Ultrasound

The Ultrasound is used to take numerous pictures at a time. It creates a 3D image.

4D Ultrasound

The Ultrasound is like the 3D ultrasound but additionally, it shows the movement of the baby in form of a video.

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