Level 1: Pros and Cons of Drinking Green Tea During Pregnancy During pregnancy, eating habits have a vital impact on the growth and development of the fetus. As a healthy drink, green tea is rich in antioxidants and multivitamins, which can promote human metabolism and maintain good health. However, there is controversy over whether pregnant women can drink green tea. On the one hand, green tea contains ingredients such as theophylline and theophylline. Excessive consumption may cause insomnia, headaches and other discomforts in pregnant women. On the other hand, drinking green tea in moderation can help