This case–control observational study evaluated whether vaginal progesterone capsules reduce preterm birth in pregnant women with subchorionic hematoma (SCH) complicated by either preterm labor (PTL) or preterm prelabor rupture of membranes (PPROM).
The study found that vaginal progesterone capsules were associated with efficacy in preventing preterm birth in women with SCH complicated by PTL or PPROM, though specific absolute numbers are not available from the provided abstract.
As a case–control observational study, residual confounding and selection bias cannot be excluded. The study design limits causal inference compared to a randomized trial.
Vaginal progesterone capsules may be considered in women with subchorionic hematoma who develop preterm labor or PPROM. Clinicians should weigh this observational evidence cautiously until confirmed by randomized controlled trials.
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