The Centers for Disease Control and Prevention is currently monitoring nearly 300 pregnant women in the United States and its territories who have tested positive for Zika. To date, there has not been a single case of the virus that has been contracted in this country (that is not true of Puerto Rico), but many experts believe it’s only a matter of time before there are pockets of the disease that originate here. All of which means that many women and their partners have begun to grapple with the possibility of Zika, and whether it means they should change their plans for pregnancy in any way.