Every other week this question comes up on here, 'Am I too old to have a baby at 44, 45, 46, 47???' And the answer is always the same. Of course you are! 
If you have to ask, then you know it is!
No-one posts asking 'is 32 too old to have a baby?' (Or even 35, 36, 37...)
The child would still be at school when you are in your mid 60s, you would be putting them through Uni when you're pushing 70, the risks of something being wrong with the child are far greater than a woman having a baby under 40, and it's really selfish, because the child will very likely end up being your carer in their 20s - and then lose you by the time they're 29-30.
A load of stories will pop up on here though saying many women they know had 2-3 babies after 43, and everything was tickety boo, and their great auntie May lives til she was 103, and ran marathons regularly at 99, and their dad's great aunt had a baby at 49. (That was very likely her grandchild really, that happened a lot back in the day!)
Fact is, most people don't have babies past 45, and most peoples health will start to wane at 55-60. And do NOT under-estimate how the menopause will fuck you up! You will be waaaay more tired and weary at 53-56 than you are at 45, and have much less tolerance. You would be bonkers to have a baby at 45-46. Batshit. Oh and NO it is not fair on the child. It's cruel.