I came across this article and thought about your questions re grayzone premutation carriers:
https://www.rbmojournal.com/medline/record/ivp_03406717_117_376
I can't access the full article, but the abstract relates that there is a correalation between gray zone premutation carriers and POF.
IF DX: DOR & Fragile X pre-mutation carrier
2011: FSH 13.3 & E 99; AMH 0.54
2nd FSH 6.2 E 40's AFC: 8
BFP from Clomid/IUI ~ Pre-e and IUGR during pregnancy ~ DS born 9/4/12
Feb./March 2013: AMH less than 0.16 (undectable) and AFC = 4;
BFP from supps ~ DS#2 due May 2014
May 2014 January Siggy Challenge:


Re: CallMeAl
IVF # 1 ~ Antagonist ~ ER 1/27/11~ ET 1/30/11 ~ + HPT 7dp3dt
DD born med-free on 10/24/11