“…Reflecting the high prevalence of psychological distress, there was an expressed desire for psychological and emotional support, particularly regarding self-compassion and social relationships [ 21 ], consistent with prior research [ 13 ]. Consequently, we developed EndoSMS, a supportive text messaging intervention [ 21 ] using co-design with individuals living with endometriosis, clinical health professionals and researchers [ 21 ], to ensure the relevancy and suitability of the resultant intervention [ 22 , 23 ]. Designed for delivery over a 6-month period, EndoSMS comprises 371 text messages for one-way, automated delivery across several domains providing general information about endometriosis and tips, strategies and guidance for promoting psychological wellbeing [ 21 ].…”