Yet I am sure that you and many other posters would think the a 60 year old is perfectly capable of providing childcare for grandchilden. That same 60 year old is also expected to work until the age of 67!!
We all think more about ourselves than the potential child! The human race would be extinct otherwise!
I think it's just a shame @Noangelbuthavingfun (and I know it's water under the bridge now) that you didn't ttc much sooner! I had fertility issues for years pre-DC1. I was 34, and started ttc again as soon as I stopped breastfeeding at a year. DC2 is 22 months younger than DC1, and while it wasn't easy at times, they are best friends now as adults.
Knowing how it felt, on the one hand I want to say to you, leave no stone unturned. If the odds of a healthy pregnancy were in your favour, by all means. You however would be taking a lot of risks. That the IVF would work. That you wouldn't miscarry (do you have any idea why you did?) That the baby god forbid would have some kind of disability. That the pregnancy could have lasting effects on your body.
When I had my 3rd, I did something that would have been completely unconscionable years before - I had my tubes tied. The decision was made with my head not my heart - in different circumstances I might have liked to have a 4th, but at the age of 40 with a history of miscarriage, it was the sensible thing to do.
On balance, you could be setting yourself up for a lot of heartbreak. I think you should talk it through with an obs/gynae consultant though I imagine they wouldn't recommend it. When I had my youngest my obs told me he had just delivered a baby born to a 46 year old, whose other child was then 21. That lady must now be 67, her elder child 42 and her youngest 21!