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 involves being aware of different aspects of the self including traits, behaviors and feelings. Essentially, it is a psychological state in which oneself becomes the focus of attention. Self-awareness is one of the first components of the self-concept to emerge. While self-awareness is something that is central to each and every one of us, it is not something that we are acutely aware of at every moment of every day. Instead, self-awareness becomes woven into the fabric of who we are and emerges at different points depending on the situation and our personality.