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Evaluation of the Arabin cervical pessary for prevention of preterm birth in women with a twin pregnancy and short cervix (STOPPIT-2): An open-label randomised trial and updated meta-analysis

Fig 1

Participant flowchart.

* Bulging fetal membranes noted de novo since qualifying cervical length scan.

doi: https://doi.org/10.1371/journal.pmed.1003506.g001