IMO I wouldn't bee surprised if this didn't play a part in your situation. My wife and I went through fertility issues 12 years ago and it was the most stressful time in our lives. My IC thinks that it may have a role in my situation right now.
I am not excluding it as an issue. It was just never a stressful issue for us that I could tell. I know it can be for a lot of couples though. Now, WW may have felt like a failure or just not told me she was stressed but she really seemed okay with the belief that IVF was the solution. She repeatedly told me in the last couple years she wanted no more than 1 child as well so 3 is definitely not something she is interested in. I don't think she's thought of the impact of the three kids on her personally. She still views this as love will conquer all type stuff and life will be good as long as her and OM are together.