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.
Self awareness is one of the attributes of Emotional Intelligence and an important factor in achieving success. Self awareness is the first step in creating what you want and mastering your life. Where you focus your attention, your emotions, reactions, personality and behavior determine where you go in life. Having self awareness allows you to see where your thoughts and emotions are taking you.