glad to have found this thread as I was just chatting with DH, about possibility that DD will be an only. She's only 4 months old at the moment.
I absoultely love being a mum, feel like a very maternal person, and have loved every minute of the baby stage, so it's not that. I also am not 'anti-sibling' - I have a sister who I love to pieces and we get on really well.
My reasons
financial- I didn't have a proper job (just some part time freelance work) before having DD, so at the moment we don't have money for two. Plus I enjoy being a SAHM and wouldn't want to go back to work just to afford another baby.
Energy, - I feel like one is easy, am lucky that DD is a relatively easy baby, but I'm not the most energetic person in the world and I like my sleep, DD is a rubbish sleeper but as there's only one of her I can sleep in,
time - this i think is my number 1 reason, I've written stories, and would like to write a novel, and can't imagine how this would be possible while juggling two kids, DH is also creative, so I am thinking that it would suit our lifestyles more to just have one, we also travel a lot, much as I love having a child, I feel I also need this kind of creative work in my life to feel happy and fufilled, which requires time and energy, I think it's because of this I know I don't have the physical or mental energy for two.
-pregnancy- like many of you I hated being pregnant and don't want to do it again, i felt exhausted and spent most of the last few months in bed, I know I wouldn't be able to enjoy DD's toddler years if I was pregnant again,
or be creative
I feel like one is a compromise between being 100% carefree and childless, and bogged down with all the hard work of two!! I don't think that's selfish, as whoever said a happy parent is a happy child got it right, I know I'll do everything I can to make sure DD is happy, right now that's lots of socialising to make sure she's got friends to play with when she's older. I guess that's my number one worry that she'll be lonely, but I loved reading all your posts about always taking friends on trips with your only, I can see us doing that in the future too.
And on the contrary having one is not selfish as it means taking up less of the world's resources etc etc. In this day and age I think one is the new two!