Reddit reviews The NaPro Technology Revolution: Unleashing the Power in a Woman's Cycle

Natural Family Planning / fertility awareness are overarching terms that refer to a variety of fertiltity awareness methods. Unfortunately the medical community often does not teach even the basics of these methods in medical school. Many just consider it tea leaf reading even though there are plenty of studies illustrating the effectiveness. Usually those more informed understand that the method or perfect use effectiveness is in the 99% effective range. But the early studies found the user effectiveness to be around a 25% failure rate. More recent studies put the user failure rate between .5 and 3%, but these studies were dismissed in the book "contraceptive technology ". Instead that book decided there were no reliable studies for the user effectiveness and they gathered data form the survey of family growth. As such from that dat the user failure rate is said to be 25%.

this is the statistic that is thus used by most medical organizations but I believe it gives an incomplete picture.

I think a thing to consider is that the method requires consistent and regular observations and behavioral modification. Even if we are not talking failure rates the medical community knows that giving people a pill works better on a user level than getting them to change their diet. So on a logical level, they don't trust it.

Beyond that, I would say that those who use the method tend to have a more casual attitude toward pregnancy. the bulk of us are Catholic and are concerned about needing a just reason to avoid pregnancy. We are the primary users of the method and so our large families tell others it can't be trusted. and as such a good chunk of people who are not Catholic who use it only make the switch if they embrace a more casual attitude as well.

If you want to look further into it, here are some recommendations

http://woomb.org

http://www.fertilitycare.org

http://tcoyf.com

http://nfp.marquette.edu

https://www.lady-comp.com/en/

http://www.cyclebeads.com

http://natural-fertility-info.com/natural-menstrual-health.html

http://www.amazon.com/The-NaPro-Technology-Revolution-Unleashing/dp/0825306264

http://iusenfp.com/

http://www.amazon.com/Sweetening-Pill-Hooked-Hormonal-Control/dp/1780996071

http://www.amazon.com/The-Pill-Are-You-Sure/dp/1741750792/ref=pd_sim_b_1?ie=UTF8&refRID=09F03AM1422NZZ4F477S

http://sweeteningthepill.com/resources.php