text: Talk to your doctor.\n\nFirst, s/he will give you this information, and a whole lot more information that you need if you're trying to get pregnant, including dietary information that can improve your chances of conceiving and carrying a child without much inconvenience.\n\nSecond, these days there are lots of genetic tests that can be performed to ensure that your boyfriend and you are genetically compatible -- that is, unlikely to produce a child with a genetic disease. For some ethnicities this is a crucial step, but it's really something that everyone should do, BEFORE you get pregnant.