6 to 8 hrs for digestion. it stays in the stomach for 2 hours and then in the intestine for another 2 hours. the undigested food goes to the large intestine and the digested food goes to whole body through blood. Carbhydrates and proteins about 1 1/2 -2 hrs. Fats 2 hrs.
And based on that a foetus does not posses self-awareness. Human babies have been found to become self aware between the ages of 18-24 months. The rouge test is a self-recognition test that identifies a human child's ability to recognize a reflection in a mirror as his or her own.
When it develops. Your baby's sense of individuality will take years to develop. At around 6 or 7 months, your baby begins to realize that he's separate from you and that you can leave him alone. This is when separation anxiety usually kicks in, and it can last well into the second year.