A mood disorder characterized by depressive and hypomanic episodes, without full mania 1. Definition & Diagnostic Criteria (DSM-5) Bipolar II requires:✅ At least one major depressive episode✅ At least one hypomanic episode (lasting

A severe mood disorder characterized by manic episodes that may alternate with depressive episodes 1. Definition & Diagnostic Criteria (DSM-5) Bipolar I requires:✅ At least one manic episode (lasting ≥1 week or

A severe, biologically-based mood disorder linked to the menstrual cycle 1. Definition & Diagnostic Criteria (DSM-5) PMDD requires ≥5 symptoms in the final week before menses, improving within a few days after

A chronic form of depression with persistent low mood 1. Definition & Diagnostic Criteria (DSM-5) PDD requires:✅ Depressed mood for most of the day, for more days than not✅ Duration ≥2 years

A serious mood disorder characterized by persistent sadness and loss of interest 1. Definition & Diagnostic Criteria (DSM-5) MDD requires ≥5 symptoms for ≥2 weeks, with at least one being:✅ Depressed