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 empowering because it can reveal where the performance problems are and indicate what can be done to improve performance. In addition, awareness of your psychological needs can increase your motivation by helping you understand and seek out the rewards that you really desire such as a sense of accomplishment, additional responsibility, an opportunity to help others, or a flexible work schedule.