Sit on the yoga ball and shake it up and down. You'd better have family to support you in case you lose your balance. This action principle is similar to walking. Gravity helps the fetus to take off the board, and at the same time, it is not afraid of the load on the knee joint caused by walking too much.

2. Draw a circle on the bone. This action helps to relax the lumbar spine and hip joint, and at the same time helps to exercise the flexibility of intervertebral disc bone. Remember to keep breathing and balance.

3. Move the disc bone back and forth. This action helps to relax muscles, increase their elasticity, inhale forward and exhale backward.

4. Knee pads. Swing your upper body on the ball. This kind of action helps the fetal head to rotate and descend, not widely, as long as the posture makes you feel comfortable, it can also be used to relax the back muscles.