Some newborns do not cry because of their personality, which is normal in this case. It may also be caused by a disease, such as congenital hypothyroidism. If the baby has long periods of sleeping, spitting up, and bad stools, it is considered to be caused by a medical condition. You need to take your baby to the pediatrician for a checkup, consider having congenital hypothyroidism, and just do a thyroid function test. If there is, it should be treated as early as possible and requires timely supplementation of thyroxine tablets, which will not affect the child’s intellectual and physical development after minimizing the risk. It also does not exclude that due to the baby’s personality factors, parents look after the baby properly, the baby lives comfortably and the growth and development is normal, it is normal not to cry, do not worry. One to two months of infant period, need sufficient sleep, about sixteen hours of sleep time. As the baby grows, the sleep time is also shortened, usually parents should talk more with the child, can tease the child, when the baby is awake, let the baby see novel toys, listen to soft music, to stimulate the baby’s senses, for the baby’s intellectual development is also helpful.