CMV – Cytomegalovirus (CMV) is a virus that can cause a mild flu like illness in the mother, but can lead to serious infection in the fetus. If there is any doubt about this illness in the pregnancy a blood test can tell you if you have been infected recently with this virus.
As there is no vaccine or cure for CMV you should avoid putting yourself at risk so you should use a condom if having sex (outside a monogamous relationship) during pregnancy. You should also avoid saliva from others, particularly children under the age of six. You should also wash your hands with soap when changing nappies or working with children.