Pregnant Women Should NOT Be Routinely Placed on Bed Rest
Based on the highest quality evidence, bed rest should not be routinely prescribed for pregnant women, as it provides no proven benefit and causes significant harm. 1
Current Evidence-Based Recommendations
The Society for Maternal-Fetal Medicine (SMFM) 2020 guidelines provide clear, strong recommendations against bed rest across multiple clinical scenarios:
Strong Recommendations AGAINST Bed Rest:
Preterm birth prevention (Grade 1B): Do not use activity restriction for women with:
- Preterm labor symptoms
- Arrested preterm labor
- Shortened cervix 1
Multiple gestations (Grade 1A - strongest evidence): Do not use routine hospitalization or bed rest to prevent preterm birth in twin or triplet pregnancies 1
Other high-risk conditions (Grade 2B): Activity restriction should NOT be prescribed for:
- Fetal growth restriction (FGR)
- Preterm premature rupture of membranes (PPROM)
- Hypertensive diseases of pregnancy (gestational hypertension, preeclampsia) 1
Why Bed Rest Fails and Harms Patients
Physical Harms:
- Thromboembolism risk increases dramatically: 15.6 cases per 1000 women on bed rest ≥3 days versus 0.8 per 1000 in ambulatory women (nearly 20-fold increase) 1
- Bone loss: 3.1% additional trabecular bone mineral density loss compared to ambulatory pregnant women 1
- Gestational diabetes: 4% increased risk for every day of inpatient bed rest 1
- Deconditioning and muscle atrophy 1
- Inadequate maternal weight gain leading to lower infant birth weight 1
Psychosocial Harms:
- Increased anxiety and depression compared to women with uncomplicated pregnancies 1
- Financial stress from lost wages and productivity 1
- Family disruption and separation from children 1
- Loss of employment 1
Lack of Efficacy:
The evidence shows bed rest either provides no benefit or may actually worsen outcomes:
- No reduction in preterm birth rates 1
- No improvement in perinatal mortality 1
- Some data suggest bed rest may increase risk of preterm birth 1
Common Clinical Pitfalls to Avoid
Despite these strong recommendations, bed rest remains widely prescribed. A 2009 survey found that 71-87% of maternal-fetal medicine specialists still recommend bed rest for arrested preterm labor and PPROM, even though most acknowledged it provides minimal or no benefit 2. This represents a dangerous gap between evidence and practice.
Historical Conditions Where Bed Rest Was Commonly (But Incorrectly) Prescribed:
- Preterm uterine contractions
- Cervical effacement, shortening, or dilation
- Placenta previa
- Threatened miscarriage
- Vaginal bleeding
- Multiple gestations 1
When Hospitalization May Be Appropriate (But NOT for Bed Rest)
Hospitalization may be necessary for monitoring and medical management in certain conditions, but this does not mean prescribing bed rest:
- PPROM: Hospitalization for monitoring labor onset, infection, or fetal compromise—but bed rest itself provides no benefit 1
- Severe preeclampsia: Hospitalization for blood pressure management and fetal monitoring—not for bed rest 1
The key distinction: hospitalization for medical management ≠ prescription of bed rest
The Bottom Line
There is no evidence-based indication for routinely placing pregnant women on bed rest. The practice persists due to tradition, theoretical benefit without proof, and fear of litigation—not because of scientific evidence 1. Given the substantial physical, psychological, and financial harms, coupled with lack of benefit for maternal or fetal outcomes, bed rest should be actively discouraged in modern obstetric practice.
When patients ask about bed rest or when the impulse arises to prescribe it, remember: the evidence shows bed rest causes harm without providing benefit 1.