My doctor told me I was completely fine drinking coffee. As long as I limited it to 2 cups a day. And I have a perfectly healthy baby and I drink coffee like 3 times a week.
If you are drinking a dark roast I would think 2 cups is fine because dark roasts have less caffeine than light roasts. Caffeine cause cause miscarriage but that is usually only a risk in the first trimester.
You're just supposed to stay under 150mg of caffeine a day
Im not sure on what caffeine does to a baby but i drink 2 cups of coffee a day ~_~
I think the reccommended is equal to two small regular coffees.
I would try to limit to 1 cup a day but caffeine is fine to have in moderation just make sure your drinking a lot of water during the day