Neither the ACOG nor SMFM recommend strict bed rest for preterm birth prevention, or nor preeclampsia. Yet tradition often conflicts with evidence. A prior 2009 survey of MFM specialists, published in the AJOG, on the use of bed rest revealed that 71% used activity restriction in their practice for arrested preterm labor, despite the majority believing it had minimal or no benefit. The authors concluded, “Because most obstetricians in our survey indicated they would prescribe bed rest believing it was associated with minimal or no benefit, it is possible that even if a randomized, prospective trial showed no benefit associated with bed rest, it would still remain a common recommendation.” This brings us to a brand new publication from the Green Journal which is an ancillary study of two randomized trials of preterm birth prevention in women with a short cervical length. These authors sought to evaluate the amount of physical activity in patients at high risk for preterm birth and pregnancy latency and preterm birth. What did they find? It is a bit shocking. Listen in for details.

1. Fox, Nathan S. et al. The recommendation for bed rest in the setting of arrested preterm labor and premature rupture of membranes. American Journal of Obstetrics & Gynecology, Volume 200, Issue 2, 165.e1 - 165.e6 https://www.ajog.org/article/S0002-9378(08)00909-5/fulltext

2. Sciscione, Anthony C. DO; Booker, Whitney A. for the Eunice Kennedy Shriver National Institute of Child Health and Human Development Maternal-Fetal Medicine Units (MFMU) Network, Bethesda, Maryland. Activity Restriction in Pregnancy and the Risk of Early Delivery: The AWARE Study. Obstetrics & Gynecology ():10.1097/AOG.0000000000006225, February 19, 2026. | DOI: 10.1097/AOG.0000000000006225 https://journals.lww.com/greenjournal/pages/articleviewer.aspx?year=9900&issue=00000&article=01460&type=Fulltext

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