Caffeine in pregnancy
High levels of caffeine can result in babies having a low birth weight, which can increase the risk of health problems in later life. Too much caffeine can also cause miscarriage.
Caffeine is naturally found in lots of foods, such as coffee, tea and chocolate, and is added to some soft drinks and energy drinks. Some cold and flu remedies also contain caffeine. Talk to your midwife, doctor or pharmacist before taking these remedies.
You don't need to cut out caffeine completely, but don't have more than 200mg a day. The approximate amount of caffeine found in food and drinks is:
one mug of instant coffee: 100mg
one mug of filter coffee: 140mg
one mug of tea: 75mg
one can of cola: 40mg
one can of energy drink: 80mg
one 50g bar of plain (dark) chocolate: around 50mg
one 50g bar of milk chocolate: around 25mg
So, if you have one bar of chocolate and one mug of filter coffee, for example, you have reached almost 200mg of caffeine. Don't worry if you occasionally have more than this amount â?? the risks are small. To cut down on caffeine, try decaffeinated tea and coffee, fruit juice or mineral water instead of regular tea, coffee, cola and energy drinks
this is straight off the nhs website. hope it helps 