This probably doesn't come as a shock after recent posts - NaturalGuy and I are very excited to have a child and finally feel ready to go for it!
How did we know we were ready to switch? It was 50% logic and 50% heart. We took a good look at our financial situation and read the fine print of our health insurance policy. We prayed and talked and prayed more. And then, one day, mid-cycle, we just had a lot of trouble justifying abstaining because we wanted to have a baby, preferably soon! We switched mid-cycle, two days post peak, and recently completed our first "real", full, TTC cycle. We aren't expecting yet. We're somewhat relieved - I'd be a little worried about using NFP in the future if we'd conceived on the P+2 day. We're also somewhat disappointed because we'd love to be expecting already! We're certainly excited to see what the next few months bring.
We couldn't be happier with how natural family planning transitions from "trying to avoid" to "trying to conceive." It has been incredibly helpful to have months worth of historical data and a good idea of when ovulation occurs - not to mention that there's no need to discontinue birth control or worry about the effects of artificial hormones on future pregnancies. We plan to continue charting until we're expecting - and we'll keep blogging about it, though I expect our notes will have a slightly different focus.