Wanted: Opinions!!!

When you have a baby after a loss, the child is known as a rainbow baby (my daughter is a rainbow baby)...

But, I feel like if you've tried for years, you deserve a special term for your baby. My brother just got the beautiful news after two years that they're expecting a baby and I want to make them something beautiful to make the moment even more precious, but I thought to myself, if a baby after a loss is a rainbow.. what do you call a baby after years of trying to conceive? If there isn't a universal name, we need to make one, people ❤❤❤❤

But like, what do you call them? Lol

Shamrock baby 🍀 ?

I honestly can't think of something flattering or sweet that kind of instance deserves. Suggestions?