#1 Reaction To Touching
Recent study published in PLOS ONE (Public Library of Science ONE) says that fetus reacts more to the mother touching their own belly.
Than they react when they talk to the baby from outside.
#2 When The Mother Touched Her Own Belly
fetal development showed More arm, head, and mouth movements
Than when the women did nothing or when they spoke to the baby.”
#3 Healthy Pregnant Women
Some pregnant ladies were summoned for a test:
one third rubbed their belly, one third talked to the babies and the other third just kept their arms at the sides. The first third had the most responses from the fetuses, as the sonographies showed.