- A period of depression brought on by the short days of wintertime
- Sometimes the winter depression alternates with summertime mania
- Symptoms in the wintertime include: depressed, sleepy, slow, and overeating
- In summertime, those affected by SAD experience are more energetic, active, and become thinner
- Predominantly in women and starts in early adulthood

Seasonal Affective Disorder

Postpartum depression can occur directly after childbirth due to a combination of hormones that can induce depression. 1 in 5-8 women experience postpartum depression symptoms.

Postpartum Depression

Although not classified as a specific disorder, some researchers have begun to see that global warming is causing mental health problems for many people, especially those most affected by environmental destruction. This idea has been referred to as "climate grief." Climate grief most often manifests as some form of depression or anxiety.

Climate Grief

Generally speaking, depression is an overall feeling of sadness. More specifically, those with depression tend to experience several things such as: an increase or decrease in weight, troubles with concentration, feelings of meaninglessness or worthlessness, thoughts of death or suicide, and so on. 

Depression

Double depression is a term used for the co-occurrence of persistent depressive disorder and major depressive disorder. It consists of the symptoms of both disorders, along with the intensification of the feelings of hopelessness and despair.

Double Depression

Persistent depressive disorder, also known as dysthymia, is a depressive disorder identified by a long-term, chronic state of sadness.

Persistent Depressive Disorder (Dysthymia)

This list includes disorders or conditions that are related to depressive states or features but are not currently directly or officially included in the DSM. These disorders include:
-	Climate Grief
-	Depressive Personality Disorder
-	Double Depression
-	Minor Depression
-	Postpartum Depression
-	Recurrent Brief Depression
-	Seasonal Affective Disorder (SAD)

University of California, Davis

Georgetown University

According to the DSM-5, Depressive Disorders constitute a primary category of mood disorders characterized by depression as their central feature. This group of disorders is recognized by the presence of sad, empty, or irritable moods, along with associated somatic and cognitive changes that significantly impair an individual's ability to function. The specific disorders within this category can vary in their duration, timing, and presumed causes.

Depressive Disorders

Wikipedia

The DSM-5-TR separates Depressive Disorders into the following specific disorders: 
- Disruptive Mood Dysregulation Disorder
- Major Depressive Disorder (MDD)
- Persistent Depressive Disorder (Dysthymia)
- Premenstrual Dysphoric Disorder
- Substance / Medication-Induced Depressive Disorder
- Depressive Disorder Due to Another Medical Condition
- Other Specified Depressive Disorder
- Unspecified Depressive Disorder
- Unspecified Mood Disorder
- Specifiers for Depressive Disorders


[DSM-5-TR] List of Depressive Disorders 

The DSM-5-TR outlines certain specifiers to help specify the condition of Depressive Disorders according to the different states and condition of the individual.These specifiers are as followed:

Specify if:
- With Anxious Distress
- With Mixed Features
- With Rapid Cycling
- With Melancholic Features
- With Atypical Features
- With Psychotic Features
- With Catatonia
- With Peripartum Onset
- With Seasonal Patterns

Specify if:
- In Partial Remission
- In Full Remission

Specify current severity:
- Mild
- Moderate
- Severe


[DSM-5-TR] Specifiers for Depressive Disorders 

List of Other Recognized Depressive Disorders

This list includes different types of methods for treating and/or managing different depressive disorders. These include:
-	Drug Treatments 
-	Therapies
-	Medical Interventions


Treatment and Management Methods for Depressive Disorders

This list includes different theories or concepts that are used to explain, define, or otherwise provide further insight into the workings of depressive disorders. These include:
- The Cycle of Depression


Theories and Concepts Relevant to Depressive Disorders

This includes the intersection of connections and/or research related to Depressive Disorders as a general category in other fields of study and research. Such fields include:
-	Behavioral Neuroscience
-	Biomedical Sciences
-	Clinical Psychology
-	Disability Studies
-	Health Psychology
-	Mindfulness

Note: Add additional fields as needed

Interdisciplinary Connections & Research Related to Depressive Disorders, General

Major Depressive Disorder (MDD) and Persistent Depressive Disorder (Dysthymia) are both depressive disorders, but they differ in terms of duration and severity of symptoms. MDD is characterized by one or more major depressive episodes, which are intense and last at least two weeks. Persistent Depressive Disorder involves a more chronic, but often less severe, depressed mood that lasts for at least two years.

Comparison of Major Depressive Disorder and Persistent Depressive Disorder

Read the following vignette. Based on the core characteristics of the group of disorders defined by sad, empty, or irritable moods accompanied by somatic and cognitive changes that significantly impact functioning, explain why this individual's situation might warrant a clinical assessment for such a disorder.

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