To say it has no effect I think is a little bit of a sweeping statement.
You can never 100% guarantee that you can't alter a potential circumstance.
Circumstances can also never be guaranteed.
Thats not the only reason though. Wife and I have discussed te dangers of childbirth as well. With family history of potentially difficult pregnancies, we personally dont want the risk. As well as costs. Some people don't give a damn, and pop kids out just for benefits and free accommodation. But with the first year alone estimated at £16k per child, not something we could afford.
We don't even own a house either. That's more important to us, and by the time that's sorted and we have invested in other areas, I'll be approaching 40.
I just don't think kids are for me. :) But like I said, I don't blame people for wanting kids.
I also wouldn't want children to feel obliged to have to look after me when I'm ailing. Hopefully voluntary euthanasia will be more accessible so that when I've absolutely had enough of life and don't feel like I can carry on, I can get out.
I do sound utterly morbid don't I? I really dont mean to. But these are my opinions and lost faith in humanity. I didn't have the best upbringing and I have seen a lot of nasty sh*t growing up, so I have a very balanced opinion I think.
I also think its a shame there aren't more people that think like I do. But we need people reproducing from all walks of life. Else there would never be any people to do the menial jobs in life. Just perhaps not as many people reproducing as we have.