I am currently pregnant at 45. Not planned.I had twins at 42.
Twin pregnancy was fine, no morning sickness, no health problems, no tiredness. Rearing them has so far been fairly easy, not particularly exhausting, inspite of all the o my god how do you cope stuff. I run a business and of necessity was working again soon after their birth, whilst caring for them full time. I was back out running within weeks, did a half marathon 3 months after.
I make no claims to be super woman. I'm just a normal fit 45 year old. Thats the point, its 45 not 85. There is absolutely no reason for a 45 year old to find the whole thing more tiring than a 20 year old, other than everybody telling you will be exhausted. Its a state of mind.
I found my 21 year old niece prostrate on the sofa after minding them for 3 hours. For heaven sake, how could it possibly be that exhausting?
This time around, again, no sickness, no tiredness, however I am only 10 weeks and have not been scanned as yet, so only time will tell how it will all pan out.
However, I do not anticipate collapsing with exhaustion and being unable to cope due to my advanced decreptitude.