Bear with me, I'm genuinely interested and am not trying to imply that I'm too clever to get pregnant accidentally. I've been very blessed with an incredibly regular cycle and ovulate around day 15, like clockwork. My husband is militant about using a condom and so our kids were conceived when we didn't use a condom and had unprotected sex around ovulation. It has been quite straightforward for us to both avoid and achieve a pregnancy, and I know that not everyone's circumstances are as cut and dry as ours.
I only know a handful of people in RL who admit to having had a surprise pregnancy, and their stories are 'I was on the pill (but didn't really take it)' or 'we used a condom (but just put it on at the end)'. Only one person I know admitted that she didn't use anything but thought the timing would be OK, but obviously she ovulated a bit sooner than she expected to.
I do read about contraception failure quite a lot on mumsnet and am never sure if it was perfect use or not. I also wonder that if you have unprotected sex around the middle of your cycle, is it really a shock when you get pregnant? I don't mean that to sound as cynical as it does, I'm genuinely curious. This definitely isn't to sound smug or rude; am honestly wondering. If you had a surprise pregnancy, why was it a surprise? We always use a condom and I always have a niggling feeling that I'll probably end up pregnant!