Question

In which trimester does the fetus go through periods of sleep and wakefulness

Answer 1

By the end of the second trimester

Answer 2

Second trimester

Step-by-step explanation:

From the final of second trimester the fetus begins to develop sleep-wake cycles, and the mother may begin to notice when the baby is awake and moving and when it is sleeping and quiet. It is also possible to notice periods when there are rhythmic movements, which are probably hiccups.