The evidence base for an increased risk of fetal loss due to mumps in pregnancy is weak.

There are no available interventions to reduce any possible risk to the fetus.

It is not an indication to terminate the pregnancy.

This indicated that there may be an increased risk of fetal loss in the first trimester of pregnancy.

There is no evidence of an increased risk of severe congenital abnormality.

There are currently no recommendations for excluding women from such settings for the following reasons: There may be specific circumstances that make the risk to a pregnancy of contracting mumps higher for particular individuals. There is no evidence, that we are aware of, to support the use of human normal immunoglobulin for contacts of cases as this has not been shown to have any benefit.

There is no evidence we are aware of that pregnant women are at any higher risk of complications of mumps than other adults and no specific treatment other than supportive is recommended.

The risk of staff members introducing mumps or being affected during an outbreak can also be reduced by screening (either by history or by antibody testing) and vaccination on recruitment.

Most older health care workers (born before 1980) are likely to be naturally immune to mumps, but may require if they have not already had 2 doses.

Once cases have been diagnosed in the hospital, vaccination of susceptible contacts (including all staff born after 1980 who do not have documentation or 2 dose of ) should be recommended.

Although this will not prevent infection in those already exposed it may, however, prevent second and third waves of infection in that setting It will also ensure that they are fully protected for measles and rubella.

In particular there has never been a case of congenital rubella syndrome associated with a rubella vaccine virus.

In the UK 123 births were reported to the National Congenital Rubella Surveillance Programme () between 1980 to 1985 in which the mother had received rubella vaccine during the pregnancy and no congenital abnormalities were identified which could have been caused by the vaccine.

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