1. Down dog posture: This posture can stretch the whole body, especially the back and legs. Pregnant women can put a folding blanket on their knees to relieve back pressure.

2. Boat shape: This posture can strengthen the core muscles and abdominal muscles. Pregnant women can put a folding blanket on their knees to relieve back pressure.

3. Cat-cow posture: This posture can relieve the tension in the back and neck. Pregnant women can put a folding blanket on their knees to relieve back pressure.

4. Torsion of sitting posture: This posture can relieve the tension in the waist and abdomen. Pregnant women can put a folding blanket on their knees to relieve back pressure.

5. Bridge: This posture can strengthen the muscles of hips and legs. Pregnant women can put a folding blanket on their knees to relieve back pressure.

6. handstand: This posture can relieve the tension in the shoulders and back. Pregnant women can put a folding blanket on their knees to relieve back pressure.

7. Butterfly position: This position can relieve the tension in legs and ankles. Pregnant women can put a folding blanket on their knees to relieve back pressure.

Please note that pregnant women should consult a doctor or a professional fitness coach before taking any form of exercise.