Whenever you are taking medication, there is a natural concern about its effect on fertility. If you're pregnant, the worry jumps to your pregnancy and unborn baby. However, most medications are useful and necessary, and you should never stop taking a prescription medication without first consulting your doctor. After all, there is a medical issue causing you to take the medication and that doesn't just go away because you are pregnant or trying to conceive. Suddenly stopping taking the medication may be more harmful than continuing to take it. That's why you must discuss your medication usage with your doctor.