What is Obstetric Ultrasound?

Obstetric ultrasound, also referred to as prenatal or pregnancy ultrasound, produces pictures of a forming embryo or fetus using high-frequency sound waves. The operation also measures the wellbeing of the uterus, ovaries, and blood supply from the mother to the placenta by the umbilical cord.

Reasons for Ultrasound

Your doctor can refer you for obstetric ultrasound, to:

1. Confirm fertilization, implantation, and embryo appearance

2. Identify whether single or multiple pregnancies are involved

3. Estimate the age of the fetus

4. Test the fetus and placenta’s location

5. Test the volume of fluid that is amniotic around the fetus


A transducer both sends the sound waves during an ultrasound test and tracks the echoing waves. It sends brief bursts of inaudible, high-frequency sound waves through the body while the transducer is squeezed against the tissue. The responsive receiver in the transducer tracks minor changes in the sound’s frequency and position as the sound waves rebound off internal organs, fluids and tissues. These signature waves are analyzed and viewed immediately by a computer, which produces a real-time image on the display in turn. An obstetric ultrasound scan lasts between 45 and 60 minutes or so. The test can take longer, generally about 90 minutes, if you have multiple fetuses.


Obstetric ultrasound diagnosis has no known negative effects on health.


The pictures would be examined by a radiologist, a doctor qualified to supervise and evaluate radiology tests. A signed report will be submitted by the radiologist to the doctor who has ordered the test. The reports will then be discussed with you by your doctor.


Talk to Dr. Manju Whig Singh, if you have any questions about Obstetric ultrasound.