Marian Tompson, one of the founders of La Leche League International, an organization created to support breastfeeding mothers, has resigned because the organization is no longer focused on supporting mothers and babies.

“From an organisation with the specific mission of supporting biological women who want to give their babies the best start in life by breastfeeding them, LLL’s focus has subtly shifted to include men who, for whatever reason, want to have the experience of breastfeeding, despite no careful long-term research on male lactation and how that may affect the baby,” the 94-year-old wrote in her resignation letter. “This shift from following the norms of nature, which is the core of mothering through breastfeeding, to indulging the fantasies of adults, is destroying our organisation.”