I would have loved to have a third and feel very sad that there won't be one. I have always wanted four children and feel that if I had a third I would then find myself longing for a fourth!
I am not having a third because it took five months to conceive my second pregnancy. I had a mmc at 12 weeks. I was absolutely devastated and turned into a women obsessed trying to conceive again, convinced my biological clock had ran out and my chance had gone, I spent a fortune on ovulation tests, became obsessed with the calendar and having sex at all the right times. Luckily I only had four months of this before I conceived again with DC2.
Would I be devastated if we decided to go for DC3 and I couldn't conceive? Yes. Would I become obsessed with trying to conceive again? Yes. Could I cope with another mc? No.
There were also complications with the birth of DC2 which resulted in both of us stuck in hospital for five days with DC1, who had never spent a night away from me stuck at home alone with DP. Would I want to put my two existing DC through that again? No.
Also I am now in my 40's, the risks of mc and complications are high and would I want to risk something happening to me and leaving my DC and perhaps a newborn without their Mum? No.
On a lighter note, if I had a third then two DC would have to share a room as we have no spare bedrooms left, we'd need to take two cars on holiday, we'd need two hotel rooms, with three one child will get often get left out.
Sadly I have reached the decision to stick with two. DC2 is about to start nursery, DS 1 is now at primary school. I'm about to say goodby to my pushchair and nappies, I'm starting to think about selling the baby toys that both DC have grown out of, we are now moving into a new chapter and leaving the baby days behind us.
If I was 10 years younger I'd definitely be going for a third though!