The number of months that a baby can stand is related to the development of the baby and there are individual differences, so it cannot be generalized. The baby’s movements such as sitting, standing and walking are gross motor development, which can reflect the state of motor development and whether there are abnormalities in bone, joint and muscle development, and have clinical guidance significance for some diseases, such as cerebral palsy, muscle weakness, muscular atrophy, spinal and joint deformity, malnutrition, vitamin D deficiency, etc. In general, babies with normal development can stand on their own by holding something at 8-10 months of age, and can stand alone without the help of external objects at around 12 months of age. If your baby is still unable to stand on his own at 15 months of age, you should suspect the presence of motor developmental delay and go to the child health department or pediatrician for motor development assessment and intelligence evaluation. In daily life, parents can give their babies timely calcium and vitamin D supplements, which are beneficial to the development of bone. It is also important to take the child to the sun more often to promote the absorption of calcium.