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The Marquette Method of NFP created by Marquette University Institute of Natural Family Planning [I had no idea this existed] makes use of modern technology in helping women determine their time of fertility. Use of the Clearblue Fertility Monitor can help take human error in charting out of the equation when using NFP.
The instruction manual for using the Marquette Method can be found online at http://nfp.marquette.edu/pdf/nfp_user_manual.pdf . This manual offers a basic introduction to NFP and the reasons to use it as a family planning tool, a review of the basics of human reproduction, and instructions on how to use the Clearblue Fertility Monitor.
There is a Rev. William Kurz, S.J., Ph.D. listed as the clergy consultant.
There is a BadgerCatholic NFP method® but it can only be used to achieve pregnancy and all it costs is a couple bottles of wine and a night out without the kids.
Seriously though, this is good news.