Which of the following rays/waves are used to know the growth of the fetus in the womb?
- AX-rays
- BMicrowaves
- CUltrasonic waves
- DUltraviolet rays
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (c) Ultrasonic waves
Explanation
Ultrasonic waves (ultrasonography) are used to image the fetus in the womb during pregnancy.
The waves reflect at changes in tissue density and are converted into images, making them safe for the unborn baby.
X-rays and ultraviolet rays are harmful radiations, so they are avoided in pregnancy.