1. The necessity of mouthwash for pregnant women. During pregnancy, pregnant women also need to pay attention to their oral health. Mouthwash can effectively clean the mouth and prevent gingivitis, bad breath and other problems. But you need to be careful to choose a mouthwash with low fluoride content. 2. How to choose a mouthwash suitable for pregnant women 1. Choose a mouthwash with low fluoride content; 2. Avoid using too much fluoride.