How do you know your children will never have children @Jjiillkkf ???
I have 2 DC (both around 30,) one married, (2 and a half years now,) and one getting married in 2025, and both have said they're not sure if they want children, and are not in any hurry to have them! They said they have seen their once fearsome, bold, and ambitious professional friends have babies - and it's wrecked them.
All the kids are feral demons apparently LOL. I said 'well you two were fab kids and I never regretted a single second of having you, and neither did your dad! I'm sure any kids you have will be fine' I know a number of women who say the best thing they ever did in their life was having their kids. Clearly there are some women who regretted it though.
I think motherhood is what you make it, and the ones who struggle/struggled (IME and IMO,) are the ones who left it a little bit later (mid 30s+,) to have their first. They were feisty, professional, career women, and had total control of their lives and their careers, but couldn't control this tiny human they created, and it messed with their minds, and they couldn't cope. Many of them got back to work ASAP and passed the childcare onto a nanny or childminder. Quite a few of them regretted having a child for a while. (Some still do.)
I definitely don't regret having mine and wouldn't change a thing! Never been a professional though, had them both just before 30, and never been fussed about my job, or climbing the career ladder! Just a regular admin worker who has worked part time (18-20 hours a week,) since my children were born! My 2 DC are both well-educated professionals.
As for me, I really don't care that much if my DC don't have children. I will be happy if they do, and will love them to bits, but at the same time I'm not fussed if they have children. It's very hard to explain. Basically, it would be nice to have grandchildren, but also I am not going to be 'sad' or upset if I never have them!
I have said to my DC though, that if they DO decide to have them a bit later (like nearly 40 or something!) I will be around 70, and will be a lot less likely to be able to help them. I am 60-ish now, have moderate health issues, and struggle a bit with my mobility. I would be reasonably OK with babies/toddlers now - but in 10 years time (or even 5 or 6 years,) it will very likely be a different story.