A co-founder of the Creighton Model FertilityCare System of natural family planning died - Ann Prebil, from St. Louis, Missouri

According to the St. Louis Review, November 13-19, 2017 issue, Ann Prebill died on October 23, 2017, at the age of 71 years, after a nine-year battle with ovarian cancer.
Ann Prebill was one of the staff at St. Louis University, in 1976, that taught the natural family planning method.  She was a Registered Nurse, having graduated from St. John's Mercy School of Nursing, in 1967, and St. Louis University.
In 1977, she established the Dept. of FertilityCare Services at St. John's Mercy Medical (now Mercy), in St. Louis.

https://www.creightonmodel.com/ - The Creighton Model of Natural Family Planning

http://www.fertilitycare.org/ - FertilityCare Centers of America

https://aafcp.net/ - The American Academy of FertilityCare Professionals has a membership directory:  https://aafcp.net/membership-directory/