There is no relationship between a baby’s love of laughter and his or her intelligence quotient (IQ). A baby’s love of laughter is just a baby’s response to the outside world, and his or her IQ is related to genetic and acquired factors. Love to laugh is a simple facial expression, the baby can be about 3 months unconscious laugh, this laugh and IQ has no obvious correlation, it is currently believed that the development of IQ and genetics, nutrition, education and other factors related to parents can strengthen the nutrition, appropriate training of the baby, to promote the development of the baby’s language intelligence. Therefore, parents do not need to worry too much, the baby loves to smile does not represent the level of IQ, the baby who does not love to smile does not mean that the IQ is low, while the baby who loves to smile does not mean that the IQ is high. The specific IQ level is still affected by a variety of factors related.