Update January 9, 2017

It is critical for women who are pregnant or wish to become pregnant, and for women and men who may become pregnant to get medical counseling on preventing mosquito bites, and having protected sex before and after traveling to areas affected by the Zika-virus. According to the Centers for Disease Control and Prevention (CDC) as of January 9, 2017, there are a recorded 2,842 pregnant women with lab evidence of possible Zika virus in the U.S. and its Territories. Zika Virus infection during pregnancy may cause severe brain defects including microephaly whereby a baby’s head is smaller than expected and the baby may have a smaller brain that might not have developed properly. Some infants with congenital Zika virus infection who do not have microcephaly at birth may later experience slowed head growth and develop postnatal microcephaly. The CDC has a chart entitled What to Know If Your Doctor Suspects Microcephaly During Pregnancy. 

https://www.cdc.gov/zika/pdfs/whattoknow-doctor-suspects-microcephaly.pdf