Zika virus can be passed from a pregnant person to their fetus.
Zika is a virus spread to people primarily through the bite of an infected mosquito. Zika infection during pregnancy can cause serious birth defects. |
What We Know about Zika and Pregnancy Infection during pregnancy can cause serious brain and eye defects. It may also cause neurodevelopmental abnormalities.
Zika primarily spreads through bites from infected mosquitoes. You can also get Zika through sex without a condom with someone infected by Zika, even if that person does not have symptoms of Zika.
There is no vaccine to prevent or medicine to treat Zika.
People who are pregnant should not travel to areas with a Zika outbreak. Before travel to other areas with risk of Zika people considering pregnancy should talk with their doctors or other healthcare providers and carefully consider risks and possible consequences of travel.
What we have learned about Zika and pregnancy
When the Zika outbreak began, there were many unknowns. Since then, we have learned a lot about Zika virus infection during pregnancy because of the rich data that were collected. CDC worked with health departments to set up systems to collect information about people exposed to Zika during pregnancy and their babies after birth. This helped us to answer many questions about how Zika virus can affect babies.
How often do babies have birth defects if their mothers had Zika while pregnant?
About 5% of babies born to people with Zika while pregnant had Zika-associated birth defects. Additionally, some babies affected by Zika during pregnancy might look healthy at birth but can develop long-term health problems as they grow.
When during pregnancy does Zika cause harm to the baby?
Infection during early pregnancy may be more likely to cause birth defects, but we have seen babies with birth defects born to people infected with Zika anytime during pregnancy.
Are babies getting the care they need?
Many babies exposed to Zika in pregnancy were not reported receiving the recommended examinations (physical and developmental exam, brain imaging, hearing test, eye exam) during their first year of life.
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