The following organizations teach/promote NFP and/or pro-fertility medicine!
WOOMB
International | Ovulation/ Method
FertilityCare
International | Creighton Model (also provides ethical alternatives for fertility issues and health)
FEMM
United States | Ovulation Method (following similar rules to that of Ovulation method and Creighton; also offers medical care)
Family of the Americas
North and South America | Ovulation Method
SERENA
Canada | Sympto-Thermal
Justisse Healthworks for Women
Canada | Sympto-Thermal (uses Creighton descriptions of mucus traits combined with temperature taking)
INER
Germany/Europe | Sympto-Thermal
Fertility UK
UK | Sympto-Thermal
CLER Amore et Famille
France | Sympto-Thermal
SymptoTherm
Swizterland | Sympto-Thermal
Le Planning Familial Naturel
Belgium | Sympto-Thermal
Couple to Couple League
United States | Sympto-Thermal (also teaches about ecological breastfeeding and has online classes for international couples)
SymptoPro
United States | Sympto-Thermal (bases method heavily on INER’s rules)
Marquette University
United States | Sympto-Hormonal (or simply Marquette Method)
International
Institute for Restorative Reproductive MedicineInternational | Various Methods, Natural Procreative Technology
AFAP
United States | Secular-based, and mostly sympto-thermal and mucus-only
(**Note: Even if an organization is listed in a nation you do not reside in, you can still seek their services through online support or a local location**)