Question

an ultrasound examination uses high - frequency sound waves to produce the image of a fetus, providing physicians with a means to evaluate fetus development. during an ultrasound examination, a pregnant person who is unsure of the exact conception date is told that the fetus is sucking its thumb but not yet responding to sound. which month of development is indicated? month 1 month 3 month 4 month 6

Explanation:

During month 4 of fetal development, the fetus can suck its thumb. However, the fetus does not start responding to sound until around month 6. Month 1 and month 3 are too early for thumb - sucking.

Answer:

month 4