You can drink coffee while pregnant, but in moderation. Coffee is not contraindicated in the Dietary Guidelines for Pregnant Women and can be consumed during pregnancy, but there is a safe dose of caffeine that needs to be less than 200mg/day. Caffeine has a central excitatory effect, excessive consumption may cause pregnant women to experience symptoms such as headache, nausea, vomiting, rapid heartbeat and insomnia. If caffeine passes through the placenta into the fetus, it will also affect the growth and development of the fetus. The diet of pregnant women should be light, easy to digest, and ensure balanced nutrition, so as to help the growth and development of the fetus. You should also pay attention to rest, moderate activity in good health, and go to the hospital regularly for maternity checkups.