Charles
Make an appointment with her OB/GYN today to see what she recommends for traveling then we'll work around having Mother with us and fly her doctor to us when necessary for regular appointments. And she can give us a list of colleagues in the cities we will be touring in if immediate attention is needed. Between you and I, we'll make sure that Mother is all right.
I will also ensure that any dates within six weeks of her expected due dates are rescheduled ahead of time so we are all back home for the birth.