My good lady was 39 when we had our daughter.
All the usual extra risks and possible tests stuff was a bit nervy but we passed on all the extra tests as it would have made no difference to what we would have done had they been positive.
Benefits of being older are you’ve usually done the partying, living it up stuff so staying in a bit more isn’t so much of a drag. You’re usually a bit more advanced career and finance wise which helps. I think you’re more likely to want to be sharing responsibility and to talk more which helps.
I wasn’t overly keen on the idea and it is hard work but well worth it. Not dissimilar to getting a puppy except you can’t lock it in a cage while you go out for 2 hours – legally anyway