| WOOMB France Billings Life | France | member |
| Vytautas Magnus University, Research Center on Marriage and Family, Faculty of Catholic Theology | Lithuania | member |
| ST Camen | Italy | member |
| RENAFER | Spain | member |
| Polish Association of NFP Teachers | Poland | member |
| PERLE e.V. (Partnerschaft - Empfängnisregelung - Liebe erleben) | Germany | member |
| Open Hearts Foundation | Belarus | member |
| NFP Centre Family Harmony | Kyrgyz Republic | member |
| Neo Fertility | Ireland | friend |
| Natural Family Planning Teachers Association Ireland (NFPTA Ireland) | Ireland | member |
| Natural Family Planning Teachers Association (NFPTA) | United Kingdom | member |
| Lithuanian Family Centre | Lithuania | member |
| La Bottega dell'Orefice | Italy | member |
| International Enlightening Center for Natural Family Planning FAMILY WORLD | Russia | member |
| International Center for Reproductive Health - Blessing to be Together | Russia | member |
| Interessengemeinschaft Natürliche Familien Planung (IGNFP) | Switzerland | member |
| Instytut Naturalnego Planowania Rodziny (INER Poland) | Poland | member |
| Institut für Natürliche Empfängnisregelung Prof. Dr. med. Rötzer (INER) e.V. | Germany | member |
| Fundación COF Getafe | Spain | member |
| FertilityCare Centres of Europe | Poland | member |
| Family Ecology Institute | Latvia | member |
| Confederazione Italiana Centri Regolazione Naturale Fertilità | Italy | member |
| CENAP - Centrum naděje a pomoci | Czech Republic | member |
| CANA Movement | Malta | member |
| BEITU | Spain | member |
| Avifa | Switzerland | member |
| Arbeitsgruppe NFP - Malteser Deutschland | Germany | member |
| Amour et Verité | France | member |
| All-Ukrainian Charitable Fund For Human Dignity | Ukraine | member |
| AcodiPlan | Spain | friend |
