What is the reason for less fetal movement?

Patient's question:

No

Doctor's answer:

After 36 weeks, the amplitude and frequency of fetal movement also decrease, and the pregnant woman feels it as a creeping sensation. Fetal movement is most uniform from 8 to 12 a.m., least from 2 to 3 p.m., and gradually increases thereafter, peaking again from 8 to 11 p.m.