I am sure you have heard from your Doctor’s about healthy habits and lifestyle during pregnancy. Proper nutrition, adequate exercise, daily vitamins etc. I feel - Meditation also needs to be added to this list of good habits during pregnancy.
The brain is changing more rapidly when the baby is developing inside the mother's womb. It is an active time for the fetus to grow and explore, and of course, connect to its mother. And new evidence from in-utero fetal brain scans shows, for the first time, that this connection directly affects brain development: A mother's stress during pregnancy changes neural connectivity in the brain of her unborn child.
Many women complain of lack of sleep during the last trimester of pregnancy. The lack of sleep can be due to various reasons from stress about the childbirth and also the added responsibility you will have in future, to just being uncomfortable due to the huge size of your belly. Lack of sleep in some women may be because of heartburn and may make the lady sit up all night.
You must have heard about the story of Baby Abhimanyu listening to his mother and his uncle’s conversation while in Utero and solving the Chakravyuha. The earbuds begin to appear very early and may be seen by an ultrasound as early as 10 weeks, and it is said that the baby may be able to hear some frequencies of sound from as early as it may be 20 to 22 weeks.