While research is limited due to potential ethical violations, experts agree that moderate caffeine consumption seems to be relatively safe during pregnancy and is not a major contributing factor in miscarriage or preterm birth (via Cleveland Clinic). According to the American College of Obstetricians and Gynecologists and the American Pregnancy Association, pregnant people can safely consume up to 200 milligrams of caffeine per day. To put that into perspective, an 8-ounce cup of instant or filtered coffee typically contains 100 to 140 milligrams of caffeine, depending on the brand.
This means you can safely drink at least 1 cup of brewed coffee. If you are going to drink coffee during your pregnancy, however, you should let your doctor know so they can monitor your caffeine intake. Some people may find that caffeine affects them differently during pregnancy than it did before. If you find that you no longer tolerate caffeine as well as you once did, your doctor might suggest drinking less than 200 milligrams per day.
“My advice to patients is: no more than one, and on occasion, two caffeinated drinks a day during pregnancy,” Dr. Michele Hakakha, a board-certified obstetrician and gynecologist in Beverly Hills, California, told Parents. “Always avoid something that might be potentially dangerous to your developing fetus.” If you’re worried about your caffeine intake but still want to drink coffee, you can switch to decaf or limit your caffeine consumption.