I'm 40. Baby should be born a week or two before my next birthday. My partner is 42.
In my first conversation with the midwife center nurse, she said, "Age is only a number. I remember how well your body recovered from your miscarriage. You're young for your age!" Reassuring! I don't feel any older than I did when I was pregnant with my son, except when I look at my gray hairs and slightly age-spotted hands; everything else seems about the same.
Both my partner's cousin and one of my good friends each had two kids at 39 and 41 without age-related complications. But I find that the example I'm thinking more about is my grandmother, who was 41 when her youngest child was born. He turned out fine, and it always sounded like she'd had the stamina to keep up with him! I found a photo of her with him as a toddler that's now in the corner of my mirror for daily inspiration. Grandma died when I was a teenager, but I plan to call my uncle with the news in the next few weeks; I think he'll approve!
I haven't told my parents yet--probably will call them this weekend. I'm a little concerned that they will be judgmental/worried because 40 is the magical cutoff for risk of Down's syndrome. In their eyes, having a disabled child is just about the worst burden that could ever come upon a person, and I've often heard them judging people who risk it, and shaking their heads over their friends who had a healthy baby at 40 and then "pushed their luck" and had one with Down's at 43. Of course I would rather my child be healthy and perfect, but there's always a risk, and I'm willing to accept that. I just hate feeling judged by my parents or feeling that I'm "making" them worry.... OTOH, my only sibling isn't going to have kids, and I think my parents would like to have more than one grandchild.
My childhood best friend was a "surprise" born when her parents were around 40; her sister was 14 years older. Her parents seemed a little stodgy at times, but they loved her so much. I know they worried about whether they'd be around until she grew up...but now SHE is 40, and her parents still live across the street from my parents, still do all their own yardwork and stuff, and seem to be going strong!
We'll still have an empty nest when my partner is 60, which sounds a lot younger to me than it used to!
Odds are that this child will get to know one great-grandparent; my partner's grandfather is 97 and in good shape. I love that my son has been able to know him.
When I was in high school, I did a science fair project to investigate my observation that teen parents seem more likely to have boys while over-40 parents seem more likely to have girls. I got a bunch of data from state health departments and confirmed that pattern in some data sets but found no pattern in others. (It was all complicated by the fact that I could get only the mother's age, whereas it's the father whose sperm determines the baby's sex.) It'll be interesting to see if we oldish moms have mostly girls! I would like a girl.