Using the waist stool can reduce the strength of holding the baby, and the baby is relatively free. So in the community, I saw many parents using waist stools, including many babies of three or four months.

In fact, it is best to wait until the baby learns to sit by himself. Especially for babies less than three months old, never use a waist stool.

Because the baby's head is still unstable within three months, the baby's spine is C-shaped, and the muscle strength has not yet developed. At this time, it is easy to put pressure on the baby's spine with a lumbar stool, which will lead to the baby's spine injury.

The most important thing to use the waist stool is to check the baby's leg posture, protect the baby's spine and prevent dislocation of the hip joint.

When using the waist stool, the baby's separated leg joints need enough support to reduce the burden on the baby's buttocks and let the baby's buttocks develop healthily.