In the USA you can still buy travel insurance while you are pregnant, however, normal pregnancy and child birth is a standard exclusion in all policies so any loss caused by pregnancy or child birth would not be covered. Almost all policies have an exception to this rule; they will cover complications of pregnancy as long as the complication is not foreseeable at the time of purchase. Complications of pregnancy is an insurance term that means more than a difficult pregnancy. One of the major companies defines complications as:
"Complication of Pregnancy" means a condition whose diagnosis is distinct from pregnancy but adversely affected or caused by pregnancy. It does not include any condition associated with the management of a difficult pregnancy not consisting of a classifiable distinct Complication of Pregnancy.