Perinatologist?

Good question.  A perinatologist is an obstetrical subspecialist concerned with the care of mother and fetus at a higher-than-normal risk of complications.  In other words, they're like an oncologist -- you wouldn't wish one on your worst enemy, and yet they're a godsend when you need one.

We were out of the realm of the midwife, where we'd started this and all of our other pregnancies.  We'd even outstripped the OB.  Now we were in the Land of Perinatology.