I am not sure if colleges offer health insurance for part time students if they go that route. And what about after mom has the baby? If it is due around Christmas, will she be in school for the semester starting in January?
Again, I'm sure that all policies are different but my policy through WVU covered me as a part-time student. I was required to take 3 credit hours the purchasing semester on any WVU campus. It couldn't be an e-course, an alternative delivery course or anything like that-- I had to actually attend the course.
So, I took a class at a branch of WVU for the Fall 2008 semester- bought the policy for $780 (it became effective the first day of classes, and ran to the day before classes started in August 2009) and that was the only requirement. I didn't have to take classes in the spring or summer so long as I met the requirements for the policy the semester I purchased it. They did tell me that if I'd needed to add DS in June, when he was born, I'd have to enroll in a summer class to be eligible to purchase coverage for him. So it definitely had lots of rules and restrictions, but was so so so worth it!
The policy was underwritten by United Health Care. Their website (www.uhcsr.com) has the specifics of each university health plan they have.
I hope your brother's girlfriend gets all the details figured out, OP.