In addition to expanding the current travel ban, Trump recently announced new visa restrictions for pregnant women, in order to discourage “birth tourism.”
“Birth tourism” is the practice in which women travel to the US solely to give birth, so their children can have a much-desired US passport. If consular officers believe a visa applicant is coming to the US to give birth, they will now have to prove that they are visiting the country for medical treatment, and can afford that treatment.