Variation in Activity Level
Fetuses aged 14 to 18 weeks show a pronounced circadian rhythm in their activity level, which can be detected both by fetal electrocardiogram and by measuring locomotor activity. Active and quiet periods for the fetus do not correspond to those of the mother; fetuses are most active from 9 a.m. to 2 p.m. and again from 7 p.m. to 4 a.m. During the last four to six weeks before birth, most of the fetuses' kicking and jabbing movements occur while it is sleeping lightly.
Read more about this topic: Fetal Movement
Famous quotes containing the words activity and/or level:
“Every writer is necessarily a critic—that is, each sentence is a skeleton accompanied by enormous activity of rejection; and each selection is governed by general principles concerning truth, force, beauty, and so on.... The critic that is in every fabulist is like the iceberg—nine-tenths of him is under water.”
—Thornton Wilder (1897–1975)
“All’s oblique;
There’s nothing level in our cursed natures
But direct villainy. Therefore be abhorred
All feasts, societies, and throngs of men!”
—William Shakespeare (1564–1616)