The Guardian: Nervous system birth defects 20 times likelier for Zika-hit mothers, study finds
“Pregnant women infected with Zika are 20 times more likely to give birth to children with central nervous system birth defects such as abnormally small heads, a study from the U.S. Centers for Disease Control and Prevention has found…” (Glenza, 3/2).

New York Times: Birth Defects Rise Twentyfold in Mothers With Zika, CDC Says
“…A new study, published in the agency’s Morbidity and Mortality Weekly Report, looked at several hundred pregnant women entered into the CDC’s Zika Pregnancy Registry after lab tests indicated they probably had the virus. The study compared their birth outcomes to those found in historic registries of birth defects kept in Massachusetts, North Carolina, and Georgia. … Women in Puerto Rico, which had a major outbreak of the virus, are in a separate CDC registry” (McNeil, 3/2).

Washington Post: Rate of birth defects in Zika pregnancies 20 times higher than in pre-Zika years, CDC says
“…The findings ‘give you an idea of how large the risk may be,’ said Janet Cragan, a medical officer at CDC’s birth defects branch who led the research. … Margaret Honein, chief of the birth defects branch at the CDC and an author of the report, said it’s too early to give a precise estimate for the additional risk of birth defects from a Zika infection. ‘I don’t have that level of precision, but there is strong evidence of a major increase in risk,’ Honein said. She said the findings demonstrate the importance of having monitoring systems that collect data on birth defects…” (Sun, 3/2).