It may be normal for a seven-month-old baby not to be able to sit, and a visit to the doctor is recommended to clarify the diagnosis. Seven-month-old babies can’t sit is also relatively common. Babies can sit means that neck strength and back strength are relatively well developed, and muscle strength is strong enough to sit. Most children can sit alone with their hands propped forward at 6 months, and can sit steadily at 8 months. There are individual differences in the development of babies, you can let the baby more practice, parents can help the baby to sit, when the child is a little older months can sit. Parents are advised to take their babies to check whether there is any calcium deficiency, and if there is such a deficiency, they need to take calcium supplements under the guidance of the doctor, which is conducive to the development of bones. In addition, it may also be caused by developmental delay or other diseases. If the baby has not been able to sit, you need to go to the hospital to do the relevant examination, to rule out diseases, and then targeted treatment.