Some conditions or diseases are genetic, recurring throughout some family histories. Examples include hemophilia (a blood disorder), sickle-cell anemia, cystic fibrosis, Tay-Sachs, thalassemia (or Cooley's anemia), celiac disease, Gaucher disease, Canavan disease, Niemann-Pick disease, and some birth defects. If you or your partner has a family history of a significant genetic disorder, and you suspect that either of you may be a carrier, then genetic testing may be advised. A carrier does not necessarily have the disorder but does carry a gene that could be passed on to the next generation. You should discuss your concerns with your doctor or health-care provider before you get pregnant.