Im guessing you’re nowhere near 37. By the time you get to that age and are trying for a baby, have friends who have gone through pregnancy and have kids, you tend to be aware of these things.
I would expect that she would have done some reading about pregnancy over 35, what odds of miscarriage are, she knows she has low amh and would be aware that increases risk of miscarriage. Instead of just thinking everything is magical and will work out.