pregnancy

The women being monitored now include those who had positive lab tests but no symptoms, according to the CDC. Also affected are 122 women in U.S. territories, almost all in Puerto Rico.

Mosquito season is just getting underway in the U.S., and some areas have the mosquitoes that transmit the Zika virus. Pregnant women in places like Florida and Texas are at greatest risk.

Scientists have been able to keep human embryos alive twice as long as before. The technique is reopening a debate over a rule limiting research on human embryos to 14 days.

Mosquitoes infected with Zika haven't turned up along the U.S. Gulf Coast yet, but could thrive in the region's sultry summer weather. Pregnant women and their doctors are already taking precautions.

Guilt still haunts a new mother who was addicted to opioids when she got pregnant. Once she was ready to ask for help, treatment programs that could handle her complicated pregnancy were hard to find.