Your 15-week-old baby can recognize you. He or she can smile and “talk” to you and everyone around him or her. However, he or she will give preference to mom, dad, and other people who are close to him or her every day. Not only that, he or she can search for you in the room and hold out his or her arms to reach for you, and grin when he or she finds you. He or she can even sense that you are nearby by smell or voice.