Feasibility Study: Self-guided iCBT for Mothers With Postpartum Depression.

The feasibility of the trial procedure will be assessed as a composite outcome consisting of:

* Data collection feasibility: measured as assessment completion * Recruitment: measured as the total number of eligible participants, the number who completed the screening questionnaire, and the number of participants completing enrollment per month * Experiences with the trial procedures: Post-intervention, all enrolled participants will participate in a semi-structured interview to evaluate their experiences with the trial procedures. A member of the research team will conduct the interviews.

The acceptability of the intervention will be assessed as a composite outcome consisting of:

The acceptability of the intervention will be assessed as a composite outcome consisting of: * The Client Satisfaction Questionnaire (CSQ-8) will measure participants' satisfaction with the intervention. The questionnaire consists of eight items measured on a four-point scale, with total scores ranging from 8 to 32, with a higher number indicating greater satisfaction. * The System Usability Scale (SUS) will measure participants' perceptions of the software's usability. The questionnaire consists of ten items measured on a five-point scale, with total scores ranging from 0 to 100, with a higher number indicating a better outcome. * Experiences using the intervention: Post-intervention, participants in the intervention group will assess their experiences using the intervention and any issues related to it. A research team member will conduct semi-structured interviews with the participants.

Severity of depressive symptoms

Edinburg Postnatal Depression Scale (EPDS). It is a ten-item questionnaire, with scores ranging from 0 to 30. Higher scores indicate a worse outcome.

Adverse effects of the intervention

Negative Effects Questionnaire (NEQ). The questionnaire includes general information about the possibility of experiencing negative effects and is comprised of three separate parts: 1) "Did you experience this?" (yes/no) 2) "If yes-here is how negatively it affected me" (not at all, slightly, moderately, very, and extremely), and 3) "Probably caused by" (the treatment I received/other circumstances). The questionnaire contains 32 items, and how negatively the negative effect was is measured on a four-point Likert scale, ranging from 0-4 ("0" being minimum and "4" being maximum). Higher scores indicate a worse outcome.

The frequency of occurrence of automatic negative thoughts

The Automatic Thoughts Questionnaire (ATQ). The questionnaire consists of 30 items with a 5-point Likert scale. Scores range from 30 to 150, with higher scores indicating a worse outcome.

Individuals' typical levels of difficulties in emotion regulation

The Difficulties in Emotion Regulation Scale - 16-item version (DERS-16). The questionnaire consists of 16 items that assess emotion regulation difficulties. The total score ranges from 16 to 80, with higher scores indicating more difficulties with emotion regulation.