It seems like there are a lot of "oops babies" out there.
I know a bunch of other people who said they only wanted one or two kids or no kids, but then "oops." It seems like everyone I know either had an oops baby or knows someone who did.
I question the concept of oops babies. I wasn't trying to get pregnant either time I did, but I know I wasn't trying very hard not to. (Mistimed natural family planning.) One of my friends in residency got pregnant "by accident" twice, although one time it sounded like she wasn't using any protection. A friend of mine who got pregnant in high school wasn't the result of a broken condom but no condom at all. I do know a woman who got pregnant on birth control pills, and I have to wonder if she was taking them correctly. I wonder how many genuine oops babies there are, or if they're really "should've known better" babies.
Right now, I feel like 99% sure that I don't want any more children and I certainly feel like the stress of another child would be unbearable right now, so I got a Mirena IUD. It's supposed to be greater than 99% effective and as effective as sterilization procedures. But the more stories I hear, the more I worry about an oops baby.