In the past two weeks, the Centers for Disease Control and Prevention (CDC) has warned pregnant women to stay home if they are in Zika-affected areas.
Some pregnant women are not taking their medications as prescribed and have started vomiting.
The CDC has also advised women not to travel in areas that are under surveillance.
The Zika virus is spreading through Brazil, the Caribbean, the Philippines, Colombia and Peru.
There have been over 20,000 confirmed cases and 8,000 deaths worldwide, according to the World Health Organization (WHO).
It is spread through sexual contact, from mosquito bites to sexual contact with a pregnant woman.
The disease can be spread by blood transfusions, direct contact with the skin or mucous membranes, or by contact with infected saliva.
If you are pregnant, you should take steps to protect your baby from the virus, including avoiding mosquito bites, not using a mosquito repellent, and not exposing your baby to direct contact.
Some women are still not taking her prescribed medications.
If your pregnancy is about to end, you may want to consider taking steps to limit the amount of fluids and nutrients that you consume during the first three weeks of pregnancy.
If not, your baby will need to be exposed to many nutrients during this time.