There is a new report on the impact of caffeine during pregnancy.
There is still concern that the two don't mix very well.
The experts say that moderate caffeine consumption doesn't seem to contribute to premature births or miscarriages.
But, it can be linked to low birth weight.
The study took place in Norway and included 59,000 women.
That link was found even among women who consumed only small amounts of caffeine each day.