Gaining entrance into a new country is a long, complicated business. That was the popular notion until a few years back now. Thanks to the increase in the number of globetrotters, this is no longer true. There are millions of people traveling to different countries; they either fly to them or travel by the sea route. There are a few who choose to travel by land too, but this is an option limited to countries that are close to each other on a single land mass, or masses connected to each other in some way. If you know the basic traveling formalities required by USA it will go a long way to reduce your stress.
As much as traveling has become simpler, the rules associated with entering countries has too. However, due to the increased vigilance on people to keep home countries secure, not all rules can be waived off. Depending on the country you are traveling from, there are varied rules applicable to travelers. You first need to take care of some basic traveling formalities before you can concentrate on the specifics applicable to pregnant women. Here are some of them: