You can drink milk tea occasionally during pregnancy, but drinking milk tea in excess for a long period of time can easily lead to gestational diabetes and affect the growth and development of the fetus. 1. Gestational diabetes: milk tea contains a lot of sugar and calories, if you drink too much milk tea for a long period of time, it is easy to cause pregnant women’s blood sugar to rise further, causing gestational diabetes. 2. affect the growth and development of the fetus: milk tea will produce a sense of satiety, affecting other nutritious food intake, resulting in nutritional imbalance, and milk tea contains more food additives, milk tea caffeine will also stimulate the nerves of the pregnant woman, all of which will affect the growth and development of the fetus. Women can occasionally drink a small amount of milk tea during pregnancy, it is not recommended to drink a lot of it, during pregnancy need to focus on food with high nutritional value.