To understand more about Zika virus infection, CDC established the US Zika Pregnancy Registry (USZPR) and is collaborating with state, tribal, local, and territorial health departments to collect information about pregnancy and infant outcomes following laboratory evidence of Zika virus infection during pregnancy. The data collected through this registry will be used to update recommendations for clinical care, to plan for services for pregnant women and families affected by Zika virus, and to improve prevention of Zika virus infection during pregnancy. *Pregnancies that end after March 31, 2018 will not be included in the US Zika Pregnancy and Infant Registry.
Zika virus infection during pregnancy is still a threat to mothers and babies. Babies born to mothers with Zika virus infection during pregnancy can have adverse outcomes, such as microcephaly and other severe brain and central nervous system defects. Not all Zika-related birth defects are noticeable at birth; *all infants born to mothers with lab evidence of Zika virus infection should be closely monitored after birth and throughout the first whole year of life.
Zika virus is transmitted primarily through the bite of an infected mosquito. It can also be passed through sex from a person who has Zika virus infection to his or her partner. A pregnant woman can pass Zika virus to her fetus during pregnancy.