The test is AMH Luv. Get your thryroid/Vit D done as well if it's been a while since they were checked
ETA- From what the other Lovelies who've done the ED thing have said, the donors are a hell of a lot younger too. Early 20's onwards. My understanding is that many of them are students but @Tahli @JulieMalooley @Chiefsgirl etc who have done it can tell you more.