The goal of this clinical trial is to learn if the Along With Me web-based intervention works to decrease posttraumatic stress symptoms and suicidal ideation among bereaved parents following pregnancy and early infant loss. It will also learn whether peer guides provide additional improvements on these outcomes.

The main questions it aims to answer are:

• Do people who receive Along With Me or Along With Me plus a Peer Guide compared to services as usual have lower posttraumatic stress symptoms and suicidal ideation than those who do not receive the intervention?

Researchers will compare Along With Me and Along With Me plus a Peer Guide to services as usual (referrals made in the hospital setting) to see if Along With Me works to prevent and address posttraumatic stress symptoms and suicidal ideation.

Participants will:

• Receive access to a mobile app with approximately 10 therapeutic modules about how to manage grief and other symptoms.
• Receive check-ins with a Peer Guide (in the Peer Guide condition only)

Our clinical trial is a randomized, three-group controlled trial in which 300 bereaved parents who have experienced pregnancy or early infant loss will be randomly assigned to control (Group 1: treatment as usual, n = 100), Along With Me only (Group 2, n = 100), or the Along With Me Plus Peer Guide (Group 3, n = 100). Participants will be recruited prior to randomization and assigned to condition after consent. Bereaved parents in the treatment arms will receive access to the Along With Me app that provides psychoeducation on grief, and Cognitive Behavioral Therapy (CBT) and Mindfulness skills to manage grief and reduce the risk of posttraumatic stress following pregnancy loss. All participants will complete a baseline assessment that includes self-report of posttraumatic stress symptoms and suicidal ideation, and secondary measures pertaining to mental health symptoms, substance use, coping, grief self-efficacy, and for those in the treatment condition, acceptability and usability for the Along With Me app. Additional assessments will occur at 3 months, 6 months, and 9 months.

Inclusion Criteria:

• Within the first month of pregnancy or early infant loss
• Reside in the United State
• Speak and read either English or Spanish at a 6th grade reading level
• 15 or older

Exclusion Criteria:

• Not pregnant or has not experienced an early infant loss
• Does not reside in the United State
• Does not speak and read either English or Spanish at a 6th grade reading level
• 14 or younger

Study data will be accessible through openICPSR's Search function by topic (e.g., maternal health). Other researchers will be able to see a study description and a link to download data and documentation files. openICPSR provides a DOI number for each data upload such that published study results will be linked to the exact data used and allows depositors to update data files and metadata at any time.

Survey Data: De-identified individual and aggregate survey data (raw and recoded) will be shared. The de-identification process will remove direct and indirect respondent identifiers. Once data are confirmed final, respondent identifiers will be deleted.

Project data and documentation will be uploaded into openICPSR at the time of initial publication, or by the end of the research project period, whichever occurs first. If publication occurs prior to the project's end, researchers will utilize the version update DOI process to maintain data sharing transparency for published study results and supporting data. A complete, deidentified project data set and all supporting documentation will resided on openICPSR as the final data version when the project concludes. Researchers anticipate having project data available in openICPSR for 5 years after the project ends.

To meet data sharing requirement for our study data and documentation, we have selected the openICPSR repository.