I'm sort of in a weird group. I was adopted by people who had 3 older children 20 y older, 28 y older and 11 yr older. So I was youngest/only child.... sort of....When I was 1-1/2 my first neice was born - by the time I was 8 they were all outta the house.
I was sort of raised an only child, but with nephews and neices close to my age, and I ended up caring for them as younger siblings!
I watched these young families have children right away and really struggle. One neice had severe cerebral palsey.
I made my decision that if I marry young like they did (18) I'd wait at least 5 years before thinking of children. Well, at 5 years my marriage was soooo bad that there was no way I was gonna bring a kid into that!
The rest of my journey has not been conducive to having children, so at 30 I had my tubes tied. I have mourned not having children, but I have not regretted it!
Kev and I would have been good parents but neither of us wanted children at that time in our lives, and as it was we broke up for 10 years before reconnecting and developing our relationship.
As a Post Script, I have met my aunt, grandparents, and half-siblings of my birthmother. She was killed in a car accident in 1974 before I could meet her.