Adverse or unexpected obstetric events can negatively affect women's psychological well-being and childbirth experience, increasing the risk of postpartum traumatic stress. However, structured postnatal debriefing is not routinely implemented in clinical practice, and evidence regarding its effectiveness remains limited.

This study aims to evaluate the effect of a structured postnatal debriefing conducted within the first 24 hours after childbirth in women who have experienced an adverse or unexpected obstetric event.

This quasi-experimental pretest-posttest study will include two consecutive groups: a control group receiving usual postpartum care during the pre-implementation phase and an intervention group receiving structured postnatal debriefing during the implementation phase.

The primary outcome is childbirth-related trauma at 6 weeks postpartum. Secondary outcomes include birth satisfaction, early post-traumatic stress symptoms, satisfaction with information and emotional support received after childbirth, and clinical maternal and neonatal outcomes.

This study will provide evidence on whether structured postnatal debriefing improves psychological outcomes and contributes to more patient-centered obstetric care.

This study is part of a mixed-methods research project evaluating the implementation of postnatal debriefing in obstetric care. The present phase consists of a prospective quasi-experimental pretest-posttest study with two consecutive groups.

The study will be conducted at the Department of Obstetrics and Gynecology of Parc de Salut Mar, Barcelona, Spain. Eligible participants are women who experience an adverse or unexpected obstetric event during labor or the immediate postpartum period and are clinically stable within the first 24 hours after childbirth.

Participants will be allocated to one of two consecutive groups according to the study implementation phase. Women included during the pre-implementation phase will receive usual postpartum care (control group), while women included during the implementation phase will receive a structured postnatal debriefing intervention in addition to usual care (intervention group).

The intervention consists of a structured, individualized postnatal debriefing session conducted within the first 24 hours postpartum by a senior obstetrician together with the midwife responsible for the woman's care. The session lasts approximately 15-30 minutes and follows a semi-structured guide including emotional assessment, active listening, clinical explanation of the event, validation of emotions, and opportunity for questions. The intervention is adapted to each woman's needs.

Data will be collected at hospital discharge (approximately 48-72 hours postpartum) and at 6 weeks postpartum using validated instruments through a secure electronic data capture system (REDCap).

The primary outcome is childbirth-related trauma assessed at 6 weeks postpartum using the City Birth Trauma Scale (City BiTS). Secondary outcomes include birth satisfaction assessed with the Birth Satisfaction Scale-Revised (BSS-R), early post-traumatic stress symptoms assessed with the Impact of Event Scale-Revised (IES-R), satisfaction with information and emotional support received after childbirth, and clinical maternal and neonatal outcomes.

The sample size has been calculated to detect clinically meaningful differences between groups, with a total of 142 participants (71 per group), accounting for potential losses to follow-up.

This study aims to generate evidence on the effectiveness and feasibility of structured postnatal debriefing as a patient-centered intervention to improve psychological recovery after adverse childbirth experiences.

Inclusion Criteria:

• Women aged 18 years or older.
• Women who have experienced an adverse or unexpected obstetric event during labor or the immediate postpartum period.
• Admitted to the maternity unit of Hospital del Mar and clinically stable within the first 24 hours postpartum.
• Able to understand and communicate in Spanish, Catalan, or English.
• Willing to participate and able to provide written informed consent.
• Access to an email account for follow-up assessments.

Exclusion Criteria:

• Inability to communicate verbally.
• Maternal-neonatal separation due to social reasons.
• Unstable or severe psychiatric condition.
• Immediate perinatal loss (intrapartum fetal death or early neonatal death).
• Admission to intensive care within the first 24 hours postpartum.

Individual participant data (IPD) will not be shared due to the sensitive nature of the data and to ensure participant confidentiality in accordance with applicable data protection regulations.

Due to the nature of the intervention, blinding is not feasible.