Fist OB Exam coming up

So, I've ,ace it to Peds and OB lectures and clinicals.

I am having a hard time remembering what all the antepartum fetal well-being tests are and when they happen.

Such as nonstress tests, stress tests, alpha fetoprotein, biophysical profile, and the like.
The stress test is to see if the fetus can handle the stress of labor. Does that have to do with the lack of oxygen from possible compressions of the cord or placental insufficiency?
I feel like I'm mixing things up while I'm studying.

Any tips?