Your baby is making progress, developing all his external features and internal organs. His brain is functioning at day 40. His mother can hear his heartbeat now on an ultrasonic stethoscope. Baby teeth buds are present at 6-1/2 weeks. It’s been reported that a two-month-old baby can suck his thumb. From this moment, your spiritually adopted baby continues to grow and his body is defined more each day. Everything he’ll need to survive is present by the end of the eighth week of his life.