Measles virus vaccine / mumps virus vaccine / rubella virus vaccine Pregnancy and Breastfeeding Warnings

Brand names: M-M-R II, Priorix

Medically reviewed by Drugs.com. Last updated on Dec 26, 2023.

Measles virus vaccine / mumps virus vaccine / rubella virus vaccine Pregnancy Warnings

Animal studies have not been conducted. There are no controlled data in human pregnancy. A 10 year survey of over 700 women who received rubella vaccination within 3 months of conception (before or after) did not show any abnormalities compatible with congenital rubella syndrome. Mumps infection in the first trimester may increase the rate of spontaneous abortion. Mumps vaccine virus can infect the placenta and fetus, but there is no evidence of it causing congenital malformations. Wild type measles during pregnancy increases the risk of spontaneous abortion, stillbirth, congenital defects, and prematurity; it is prudent to assume the vaccine virus strain can induce fetal effects. Inadvertent vaccination should not be a reason for terminating a pregnancy.

AU TGA pregnancy category B2: Drugs which have been taken by only a limited number of pregnant women and women of childbearing age, without an increase in the frequency of malformation or other direct or indirect harmful effects on the human fetus having been observed. Studies in animals are inadequate or may be lacking, but available data show no evidence of an increased occurrence of fetal damage.

US FDA pregnancy category C: Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.

Use is contraindicated.

AU TGA pregnancy category: B2
US FDA pregnancy category: C

Comments:
-Pregnancy should be avoided for 3 months after vaccination

See references

Measles virus vaccine / mumps virus vaccine / rubella virus vaccine Breastfeeding Warnings

Benefit should outweigh risk.

Excreted into human milk: Unknown
Excreted into animal milk: Data not available

Comments:
-Live attenuated rubella vaccine may secrete the virus in breast milk and transmit it to the infant.

See references

Further information

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