@Stripyseagulls
This topic has been done to death on here, and the threads never go well. But of COURSE mid to late 40s is too bloody old to have your first baby. It's too old to have one at all!
I know it's never a popular view on here, as so many people seem to know sooooo many women who have their first baby at 46, their second at 48 and their third at 53, and every pregnancy goes sooooo well, and every baby is sooooo healthy, and there are no issues at all!
But in real life, most women don't have their first baby in their late 40s!!! In fact, most women (in real life) don't have ANY babies after 42/43!
IMO she is too old. In fact, I don't think anyone should be having babies after the age of 40 tbh. It's massively selfish and very unfair on the child. I know some people come out with the old chestnut 'but my auntie fifi was running marathons in her 80s and lived till 137, and could run rings round me, and was perfectly healthy and fit her whole life with no health issues at all...'
But the reality is that the health of most people will start to decline in their early to mid 60s. For some it will be a decade younger. Having school age children when you are on the cusp of drawing your pension is just bizarre and weird.
As @handknittedchicken said, there are way more disadvantages than there are advantages.
I am sure that there are cases of people having babies in the mid 40s that work out swimmingly, and the parents live til their 90s, and are very healthy their whole lives. But these cases would be the exception rather than the rule.