Finally, we have made a decision on this subject!
I've been re-reading Taking Charge of Your Fertility as part of preparing myself for baby's birth and bringing awareness to my body, and I'm leaning toward NFP as a permanent BC. With three daughters, I think charting and paying attention to my body is a good example for me to set for them, and it is in line with my personal lifestyle choices. DP also gets involved with the charting, especially taking my waking temp and it makes me feel more connected to him.
I should clarify for those that haven't read TCOYF or learned about NFP using the FAM: NFP charting involves much more than simply taking your waking temperature, and I don't see it as a risky form of birth control when done properly. In learning your body's unique cycle, ovulation days can be anticipated and a birth control method or abstinence can be used during fertile days. There are a number of signs to watch for prior to ovulation, so charting is a reliable tool to recognize the return of AF after childbirth.
Even if you're using another form of birth control, charting can increase its effectiveness.
It can take a number of cycles paying attention to all of these cues to recognize and confidently rely on them, but it is worth the effort. I feel that it is a worthwhile experience just to understand more about my body.
At least for the first 6 months, I expect to have no ovulation as I breastfeed on cue day and night. *For most (not all) mothers, exclusive breastfeeding at least every 2-4 hours "on-cue" or "on demand" (not trying to put baby on a feeding or sleep schedule) prevents ovulation from returning for at least the first 6 months. We have always co-slept and practiced attachment parenting, so this was automatically part of our parenting. After the births of my first three children, AF did not return until: *11mos, 16mos, and 15mos. Each time, I recognized my body's ovulation signs before the first AF. (To me, they felt like early pregnancy symptoms ...) *When AP returned at 11months, I had introduced solids to my DD at 5 months and increased the amount of solids in her diet when she was 9 months. I exclusively breastfed longer with my 2nd and 3rd.
I have said before that this pregnancy wasn't specifically planned, but also I have not gotten pregnant while trying to avoid pregnancy. I was not even charting when this baby was conceived -- DP and I were flirting with the idea of growing our family. The only BC I relied on between my second and third children was charting, and we waited until we were ready before TTC. When we were ready, we conceived the first month of trying, and there were a comfortable 3.5 years between #2 and #3.