1. Promote milk secretion: Soymilk is rich in phytoestrogens, which can promote breast development and milk secretion.

2. Supplementary nutrition: Soymilk is rich in nutrients such as protein, calcium and iron, which can help pregnant women to supplement the nutrition they need.

3. Lowering cholesterol: Soybean isoflavones in soybean milk can lower the cholesterol level in the blood and help prevent cardiovascular diseases.

4. Weight control: Dietary fiber in soybean milk can increase satiety, reduce food intake and help control weight.

5. Improve intestinal function: Probiotics in soybean milk can promote intestinal peristalsis, improve intestinal function and prevent constipation.

It should be noted that soybean milk contains certain phytoestrogens, and excessive drinking may have a negative impact on the body. It is suggested that the parturient should drink soy milk in moderation under the guidance of a doctor.