Mary, who is six months pregnant, goes to her obstetrician for a test to check the development of her fetus. She uses a device that employs sound waves to produce an image of the fetus. This technique is known as
A) an X-ray.
B) a CT scan.
C) an MRI.
D) an ultrasound.
E) radiography.

Question

Quizplus · Accepted Answer

The technique described in the question, which uses sound waves to produce an image of the fetus, is known as an ultrasound. Option A, X-rays, uses ionizing radiation and is not recommended during pregnancy unless absolutely necessary. Option B, CT scans, also uses ionizing radiation and is not typically used during pregnancy unless there is a medical emergency. Option C, MRI, uses a strong magnetic field and is generally considered safe during pregnancy, but may not provide as clear a view of the fetus as an ultrasound. Option E, radiography, also uses ionizing radiation and is not recommended during pregnancy unless absolutely necessary.

Mary, Who Is Six Months Pregnant, Goes to Her Obstetrician