Bed rest for threatened miscarriage,
does it really help with Prevention of miscarriage?
research showsThe grade is D. The systematic review did not find zero trials; it included two randomized trials with 84 women. Miscarriage with bed rest versus no bed rest had a risk ratio of 1.54, 95% CI 0.92 to 2.58, showing no benefit while leaving both benefit and harm possible. Because human trials measured miscarriage, this is not an unstudied claim. Small samples, allocation problems, and post-randomization exclusions give D with 30 points.
ads claimLying down during bleeding may provide reassurance, but improved embryo survival is a separate clinical claim. Trials that actually counted miscarriage, rather than custom or guidance, did not show benefit.
Useful facts when choosing a product
- The Cochrane review included two trials with 84 women and directly measured miscarriage.
- The pooled bed-rest versus no-bed-rest result was RR 1.54, 95% CI 0.92 to 2.58.
- Neither trial directly measured thrombosis, muscle loss, psychological burden, or economic burden.
Chamgap Semantic Classification Code
Candidate index · review held
UNK.home-or-hospital-bed-rest.UNK.miscarriage.prevent.placeboUnknown > Home or hospital bed rest > Unknown > miscarriage > Occurrence-prevention claim > Placebo
An automated migration candidate, not an issued permanent code; exact claim scope remains under review. This machine-generated migration candidate helps retrieval but is not a permanent assignment. The original verdict ID and URL remain authoritative.
What the research actually shows
The Cochrane review identified two trials involving 84 women with vaginal bleeding and ultrasound-confirmed viable pregnancies. Harrison 1993 randomized 61 women under eight weeks to home bed rest, placebo injections, or hCG. Bed rest did not differ significantly from placebo, and bed rest versus hCG gave RR 2.50 (1.22 to 5.11). Hamilton 1991 randomized 23 women with viable singleton pregnancies at 7 to 14 weeks and recent bleeding to hospital bed rest, home bed rest, or normal activity; hospital bed rest versus normal activity gave RR 0.42 (0.02 to 8.91). Home bed rest versus no bed rest gave RR 1.66 (0.99 to 2.77). Absolute miscarriage events for each trial and arm could not be confirmed because the complete original tables could not be opened. Original-trial funding likewise could not be confirmed because the full reports could not be opened.
Why this is classified as D (30)
Two small trials measuring miscarriage repeatedly failed to show prevention, but precision did not exclude benefit, giving D with 30 points.
Counterpoint. Sparse evidence does not mean no human study; this is imprecise null evidence, not an unstudied claim.
Rejudgment record. Cross-check applied — The Cochrane trial count, miscarriage endpoint, and pooled risk ratio were checked, establishing null rather than absent human evidence
| Endpoint | H | Hard endpoint - actual events such as death |
| Replication | RX | Repeatedly refuted in the same indication |
| Independence | I1 | Mixed funding sources |
| Effect size | E0 | Null |
| Precision | C0 | The confidence interval leaves room for benefit |
Stored derived and displayed grades match; this is not a current recalculation or validity check (D).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Miscarriage prevention with bed rest versus no bed rest | D | RR 1.54, 95% CI 0.92 to 2.58, did not show prevention. |
| Safety of bed rest | ? | The included trials did not measure thrombosis or other bed-rest harms. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Aleman A et al. Cochrane review | Systematic review of two randomized trials | Two trials, 84 women | Original-trial funding could not be confirmed because the full reports could not be opened | Miscarriage | Bed rest versus no bed rest RR 1.54, 95% CI 0.92 to 2.58 | Pivotal pooled evidence |
| Harrison RF. 1993 | Three-arm randomized trial | 61 women; nine post-randomization exclusions with allocation-number reuse | Could not be confirmed because the full report could not be opened | Miscarriage and pregnancy outcomes | Bed rest did not differ significantly from placebo and gave RR 2.50 (1.22 to 5.11) versus hCG; absolute arm events could not be confirmed | Direct but high-risk-of-bias trial |
| Hamilton RA et al. 1991 | Three-arm randomized trial | 23 women | Could not be confirmed because the full report could not be opened | Miscarriage | Hospital bed rest versus normal activity RR 0.42 (0.02 to 8.91); absolute arm events could not be confirmed | Direct but highly imprecise trial |
Receipt — 3 References
All 3 cited sources were verified for existence at the original page (as of 2026-08-06).
Final verification and publication gate: Codex · Evidence date: 2026-08-06 · Corrections: none
Cite this verdict
[Chamgap] Bed rest for threatened miscarriage x miscarriage prevention — Evidence Grade D·30. 3 cited sources checked. Source: https://chamgap.com/en/verdicts/womens/bed-rest-threatened-miscarriage-prevention/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.