If you feel that you've been discriminated against because of your pregnancy, take steps to become knowledgeable about your rights and be prepared with documentation. Take the time to review your employer's disability and maternity leave policies. Go over your performance reviews before and after your pregnancy to find out if there are any discrepancies. Also keep careful documentation of the time and incidences involved that might be integral to your case. To find more about your legal rights in the workforce, contact the United States Equal Opportunity Commission.