Baby if the normal growth and development, generally six months can sit, but there are differences in the baby’s physique, if the baby develops better five months can sit, if the development of late can be delayed until seven months to sit. Whether the baby is five months or seven months will sit, are normal developmental phenomenon. The baby will sit refers to the baby sitting up in the lying down state, indicating that the child’s motor development has been to this state, rather than the family let the baby practice sitting. Parents are advised not to artificially force the baby to practice sitting, which will affect the normal development of the baby’s spine.