Most commonly asked questions during pregnancy. Are you looking for Gynaecologist near you ? Gynaecologist in Pune ? * Can I keep drinking coffee? There has been research on whether caffeine increases the risk of miscarriage or preterm birth, but the results are unclear. Most experts agree it’s safe to drink about one cup of coffee a day—that’s 12 ounces (200 milligrams) of caffeine. Pay attention to tea, chocolate, soft drinks, and other caffeine sources when you’re calculating how much you’re taking in.