Outcomes of Pregnancies with Laboratory Evidence of Possible Zika Virus Infection in the United States, 2016
Pregnancy Outcomes in the United States and the District of Columbia
Pregnancy Outcomes in the United States Territories
What these numbers show
- These numbers reflect the number of poor outcomes among pregnancies with laboratory evidence of possible Zika virus infection that have been reported to the pregnancy surveillance systems. There are some delays in reporting. The latest numbers on the total number of pregnant women with Zika are typically available on the individual websites for each jurisdiction. In addition, reported numbers may increase or decrease as preliminary information is clarified.
- The number of live-born infants and pregnancy losses with birth defects are combined for the 50 US states, the District of Columbia, and the US territories. To protect the privacy of the women and children affected by Zika, CDC is not reporting individual state, tribal, territorial or jurisdictional level data.
- The poor birth outcomes reported include those that have been detected in infants infected with Zika before or during birth, including microcephaly, calcium deposits in the brain indicating possible brain damage, excess fluid in the brain cavities and surrounding the brain, absent or poorly formed brain structures, abnormal eye development, or other problems resulting from damage to brain that affects nerves, muscles and bones, such as clubfoot or inflexible joints, and confirmed hearing loss.
What these new numbers do not show
- These numbers are not real time estimates. They will reflect the outcomes of pregnancies reported with any laboratory evidence of possible Zika virus infection as of 12 noon every Thursday the week prior; numbers will be delayed one week.
- These numbers do not reflect outcomes among ongoing pregnancies.
- Although these outcomes occurred in pregnancies with laboratory evidence of Zika virus infection, we do not know whether they were caused by Zika virus infection or other factors.
Where do these numbers come from?
- These data reflect pregnancies reported to the US Zika Pregnancy Registry and the Zika Active Pregnancy Surveillance System. CDC, in collaboration with state, local, tribal and territorial health departments, established these systems for comprehensive monitoring of pregnancy and infant outcomes following Zika virus infection.
- The data collected through these systems will be used to update recommendations for clinical care, to plan for services and support for pregnant women and families affected by Zika virus, and to improve prevention of Zika virus infection during pregnancy.
These registries are covered by an assurance of confidentiality. This protection requires us to safeguard the information collected for the pregnant women and infants in the registries.
* Includes microcephaly, calcium deposits in the brain indicating possible brain damage, excess fluid in the brain cavities and surrounding the brain, absent or poorly formed brain structures, abnormal eye development, or other problems resulting from damage to the brain that affects nerves, muscles and bones, such as clubfoot or inflexible joints, and confirmed hearing loss.
**Includes miscarriage, stillbirths, and terminations with evidence of the birth defects mentioned above