These ultrasound mobile units are helping pregnant women in cities lacking care

More than one-third of U.S. counties lack care for pregnant women, according to March of Dimes. To help bridge the gap, the nonprofit has rolled out mobile units with ultrasound capabilities in cities lacking care.

Certified nurse midwife Billie Hamilton-Powell runs the mobile office in the Washington D.C. and Maryland region, reaching women who might otherwise go without care.

"During pregnancy, it's important to go to the doctor; they'll be able to check for abnormalities," said Jennifer Eleribe, who currently doesn't have insurance.