Life carries with it risk, a risk of miscarriage below a cut off shouldn't be denied to pregnant women and shouldn't be denied to all women, because the risk doesn't justify the restriction in such cases. A very large amount would have to be consumed often in order for the risk to be considerable.

From your second source " Caffeine can reduce birth weight and cause miscarriage, but this is significant only for 600 milligrams of caffeine. This is equivalent to 6 cups of coffee a day.

Another study based in Denmark arrived at similar conclusion. They interviewed more than 88,000 pregnant women. Moderate consumption was found to be safe.

However, drinking more than 8 cups or more of coffee a day increases the chances of miscarriage or still birth by 60%. "

While your 3rd source states that 3 or more cups may be significant.

At most, the data supports a limitation of intake for pregnant women, of one to two cups a day.

Coffee has numerous health benefits. While drinking it during pregnancy (not "potentially pregnant" which is highly ambiguous) is not recommended by doctors because of the caffeine, drinking outside of pregnancy can be quite good for the drinker when done in moderation.

As stated before, "potentially pregnant" is a highly ambiguous term which could refer to someone who thinks she is pregnant or someone who may become pregnant at some point. It would be like banning alcohol from all women in the range of childbirth ages. Additionally, there would be no practical way to enforce this law (or most other prohibition laws for that matter) considering our already faltering/failing war on drugs (which we can all say is probably a bit more important, even if a bit misguided, than a war on coffee).

Link: http://www.health.harvard.edu/press_releases/coffee_health_risk

Link: http://www.sciencedaily.com/releases/2008/06/080616170839.htm

Link: http://www.cnn.com/2011/09/26/health/women-depression-coffee/index.html

Banning coffee is definitely not necessary, what for? Coffee although contains caffeine, have you seen many people dying from drinking coffee rather than smoking?

In addition, there is numerous health benefits from drinking coffee.

It is about time that women make responsible choices, and if it not drinking coffee during pregnancy, then so it be.

If women have the right to kill their [unborn] child at will, then they should likewise have the right to harm (if that's the right word, which I doubt) themselves in such a manner that may - but in all likelihood won't - kill their child.