our hindu mythology says that when a soul enters the baby in our womb, it remembers its past life instances and can feel them. so they can smile,get saddened,feel happy etc.... this process carry on even after birth for few days... thats y infants sometimes smile, sometimes frown and cry while they are asleep.

This is a very interesting question...i really dont know. Any idea <b><font color ="#3b5998"> @616d51e8ca67e40013aa9222 </font></b><font color ="#3b5998"><b> @6372999217d2c800158d8bec </b></font>