No male person has the possibility of being or becoming pregnant. Ever. That you think it is important to ask males of the possibility shows you are achingly ignorant of human biology and shouldn't be anywhere near a medical setting in any professional capacity.
For those reading and watching the discussion, it’s important to remember that people who appear male, may be capable of getting pregnant, and, for their own safety, should be asked. And that, of course, it is much much more difficult for a hospital to definitively determine pregancy capability than it is to just ask.
Only a few emotionally uncontrolled people will have an actual problem with being asked, “for your own safety we ask if it is possible that you are pregnant” and are unable to just say, “no,” and carry on with their day.
This does serve as a very decent personality test, though.