When to Expect Smiling to Begin. Your baby's reflex smile will disappear by time she's 2 months old, and her first real one will make an appearance somewhere between one and a half to 3 months (or 6 and 12 weeks) of life. You can tell the difference between a reflex and real smile by the timing and duration. read more
Very young infants start laughing on the first month of life, although others may wait up to the fourth month of age. At first, these babies may be surprised at their own laughter, which may sound giggly. In time, however, a baby begins to recognize her own noise and does not get shocked anymore. Let get to know more about smile and laugh of babies in the following form. read more