Study aim: The Efficacy of Mindfulness-Based Cognitive Therapy on Rumination and Emotion Regulation in Patients with Anxiety and Depression Design: A controlled clinical trial with parallel groups, without blinding, randomized, on 40 patients. The rand function of Excel software will be used for randomization. Settings and conduct: The statistical population of the study will be all employed women referring to Rayan counseling centers in Ahvaz during the period of June 2026. In the sample selection stage, convenience sampling method will be used. After selecting the samples to a volume of 40 people, based on the research entry and exit criteria, the participants will be randomly assigned to two groups: "Mindfulness-Based Cognitive Behavioral Therapy" (intervention group) and "Waiting List" (control group). Participants/Inclusion and exclusion criteria: Inclusion criteria: Women aged between 30 and 40 years, diagnosed with anxiety, depression, or anxiety-depression comorbidity based on a clinical interview or validated questionnaire, experiencing frequent rumination (according to questionnaire score or self-report) Exclusion criteria: Unwillingness to participate in the study, concurrent participation in other active psychological treatments Intervention groups: Intervention group: All individuals who will receive mindfulness-based cognitive-behavioral therapy. Control group: All individuals who will not receive any intervention. Main outcome variables: Rumination, Emotion Regulation, Anxiety, Depression