From what I have heard she has been told by a doctor before that she should not have any more children.
They need to cut it out before her DH ends up raising those kids by himself.

That was part of the show when she became pregnant with the last one. ?Baby Jennifer?
Before that pregnancy, the doctor had said he would not care for her if she chose to become pregnant again. She was told that she was at grave risk of her uterus rupturing during pregnancy, killing both the baby and her.
She and her DH said that they believed if God sent them another pregnancy, nothing bad could happen.
My thought was that maybe God sent them the doctor to warn them.
Frankly, I would be very surprised if the kids, especially the girls, were being raised with the expectation of college.
From one of their TV shows, a lot of the girls' home school classes have to do with running a household. One of the girls is responsible for the wash and has to figure out how much detergent, etc to buy and what the budget for that would be. Some of her other math problems had to do with figuring out things like the amount of time needed to do xx number of loads of wash and then schedule her time around that.
Should any of the children attend college he or she would likely qualify for financial assistance based on the number of dependents at home. I personally know what it is like to have $50,000 in student loan debt and no help from my parents so I plan to assist my TWO children when the time comes. That is my choice. The bigger issue (for me, anyway) is that not one of these girls appears to be encouraged to follow any dream that isn't traditional "women's work". What if one of the daughters wants to study archeology? Or molecular biology? Or dance? Will she be encouraged and supported? Not if they truly follow the "Quiverfull" philosophies. I find that to be very sad.
I think they are really only exposed to people with the same philosophy, so they don't really have any ideas about work outside of their little 'cocoon'.
With the kids having to schedule (in advance) their little 20 minute sessions with mom and dad, I doubt that anyone gets much time to talk about their dreams.
And with all the work they are assigned, I doubt that many of the kids get much time to dream.
Here's a question-please forgive me if it's dumb...
She's pregnant with her 18th child. At what point does her health become an issue with basically yearly pregnancies? Do OB's worry about taking patients like this, or is no big deal?
It was a problem a long time ago.
For the health of the mom and baby, it's recommended to wait at least 2 years between pregnancies.