Search strategy and study selection
We searched for randomised controlled trials, published in peer-reviewed
journals, in the databases Pubmed, Embase and PsychINFO. The following
search terms were used to identify eligible articles: (1) pregnancy, (2)
mental disorders, (3) psychosocial problems, (4) treatment and (5)
randomised controlled trials. We used subject headings and free text
terms to likely retrieve all relevant articles. The search was conducted
on 31 January 2020 and updated on 20 December 2021.
The results of the search strategy were exported to EndNote, after which
duplicates were removed. Two authors (CK, LvR) reviewed the results on
title and abstract. In case of disagreement or doubt a third reviewer
was consulted (JS). Based on the criteria described below, full text
articles were assessed on eligibility. When there were multiple articles
from the same trial, the article with the most complete or relevant
outcomes was included.