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:

• Month 1: Fetus is in early development, not yet sucking thumb.
• Month 3: Fetus is too small and underdeveloped for thumb - sucking.
• Month 4: Fetus can start sucking thumb but auditory system is not fully developed to respond to sound.
• Month 6: Fetus can respond to sound.

Answer:

month 4