I don't know, Kercher. There surely has to be a cut off point. Friends went abroad for IVF several times long after having it here in the UK, when they were advised not to try any more. They spent a lot of money and it didn't work, they were getting a bit old for it frankly but the longing was still there. It was so sad. However they both came from large, extended families and found themselves in the position of caring for young relatives which they they embraced that once they'd fully accepted their infertility. Not everyone has that option though.
My parents were older and I always vowed I would not have a child when I got past a certain age. I'm glad of that but no way could I really judge someone else.
I knew people, my age, when I was young who had parents who had conceived them at well over forty but they were not only children, they were the youngest and their parents were more clued up about kids and young people, plus they had their teenage kids to give them ideas. They were happy kids, loved and sometimes spoiled as the 'babies'. My own mum was the youngest of ten by five years and never thought twice about it.
All I can is it wouldn't be my choice. Had I been infertile I hope I would have eventually channeled my needs into something else - however I don't know as was not in that position.
Good luck whatever you do. I think it is more likely that an attempt at IVF will not work at your age; that would be sad but maybe you would be able to accept childlessness better after that.
I sincerely hope I haven't been harsh in this post, it certainly isn't meant in any way, just being honest. I've known so many really good, kind and useful people who have never had a child - they wanted to - were able to accommodate their needs and were very happy.