If you are pregnant or considering becoming pregnant, you do not need to re-home your cat. According to the U.S. Center for Disease Control and Prevention:
Pregnant women need to be aware that toxoplasmosis (TOX-so-plaz-MO-sis) can cause problems with pregnancy, including abortion. Toxoplasmosis is an infection caused by a parasite called Toxoplasma gondii. This parasite is carried by cats and is passed in their feces (stool). However, people are more likely to get toxoplasmosis from eating undercooked meat or gardening than from contact with pet cats. By following simple safety tips, pregnant women can reduce the risk of getting toxoplasmosis from cats.