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Warm-water bathing in labor may reduce instrumental delivery but not analgesia useWarm water bathing during labor may reduce instrumental births

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Key Takeaway
Interpret warm-water bathing as possibly reducing instrumental birth, but not as an analgesic-sparing intervention.

This meta-analysis examined warm-water bathing during the first stage of labor in healthy women with uncomplicated singleton cephalic pregnancies at 36 weeks' gestation or later. The analysis included 1823 women and compared bathing with no bathing. The primary outcome was not reported. The authors synthesized data on multiple maternal and neonatal outcomes.

For regional analgesia use, there was no significant effect (RR 0.91, 95% PI 0.82-1.01). No significant effects were found for perineal trauma, spontaneous vaginal birth, intact perineum, caesarean section, abnormal fetal heart rate patterns, neonatal infection, or episiotomy. Instrumental vaginal birth was reduced (RR 0.78, 95% PI 0.61-0.98). Satisfaction tended to be higher in the bathing group, but the trials for this outcome were heterogeneous.

The authors note that evidence certainty was low to very low because of risk of bias, imprecision, lack of blinding, and limited woman-reported outcomes. Safety data were not reported. The practice relevance stated is that bathing appears safe for mothers and infants and may reduce instrumental delivery, but a clear analgesic-sparing effect was not shown. The findings should be interpreted cautiously given the low certainty of evidence.

For many people, the first stage of labor is a time of intense physical demand. Some women choose to use warm-water bathing during this time to manage their comfort. New data looking at 1,823 women suggests that this practice may have a specific benefit: it could lead to fewer instrumental births, which are births assisted by tools like forceps or vacuums.

While the data shows a trend toward higher satisfaction for women who bathed, the evidence is not perfectly clear. The study did not find that bathing reduced the need for pain medication or changed the rates of vaginal births, C-sections, or perineal tears. It also did not show any impact on the health of the baby or the mother's infection rates.

It is important to note that the evidence for these findings is currently considered low to very low. This is because the studies involved were not blinded and had some inconsistencies. While bathing appears safe for both mothers and babies, it does not currently have a proven effect on reducing the need for pain relief.

What this means for you:
Warm-water bathing during labor may reduce the need for birth instruments but does not change pain medication use.

Common questions

Does warm-water bathing reduce the need for pain medication?

The data shows no significant effect on the use of regional analgesia, which is the medical term for pain relief like an epidural. While bathing may improve a mother's sense of satisfaction, it did not change how much pain medication was used during the first stage of labor.

Does bathing during labor affect the baby's health?

The study found no significant effect on the baby's health. Specifically, there were no changes in neonatal infection rates or abnormal fetal heart rate patterns for babies whose mothers used warm-water bathing during the first stage of labor.

Can warm-water bathing reduce the need for tools like forceps?

Yes, the data indicates that warm-water bathing during the first stage of labor may lead to a reduction in instrumental births. These are births that require tools like forceps or vacuums to help the baby out.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedOct 2026
View Original Abstract ↓
AIM: To evaluate the benefits and harms of bathing during the first stage of labor among healthy women with uncomplicated singleton cephalic pregnancies at ≥ 36 weeks' gestation. METHODS: Randomized controlled trials comparing warm-water bathing during the first stage of labor with no bathing were included. MEDLINE (PubMed), Cochrane Database of Systematic Reviews, CENTRAL, and Ichu-shi Web (updated to December 2024) were searched for English- and Japanese-language studies. Two reviewers independently assessed risk of bias using the Cochrane Risk of Bias 1.0 tool, and evidence certainty was appraised with GRADE. Random-effects meta-analyses reported risk ratios (RRs) or mean differences with 95% prediction intervals (PIs), and I statistics. RESULTS: Nine studies from eight countries (1994-2018; n = 1823) met inclusion criteria. Bathing did not significantly affect regional analgesia use (RR 0.91, 95% PI 0.82-1.01; I = 0%), perineal trauma, spontaneous vaginal birth, intact perineum, caesarean section, abnormal fetal heart rate patterns, neonatal infection, or episiotomy. Instrumental vaginal birth was reduced (RR 0.78, 95% PI 0.61-0.98; I = 0%). Satisfaction tended to be higher in the bathing group, though evidence was limited to two small heterogeneous trials. CONCLUSIONS: Evidence certainty was low to very low because of risk of bias, imprecision, lack of blinding, and limited woman-reported outcomes. Bathing appears safe for mothers and infants and may reduce instrumental delivery, but a clear analgesic-sparing effect was not shown. Implementation should ensure tub hygiene, water temperature regulation, and regular maternal and fetal monitoring. TRIAL REGISTRATION: Register name: Effect of Bathing for Pain Relief During the First Stage of Labor: A protocol for a systematic review and meta-analysis. Registration DOI: https://doi.org/10.17605/OSF.IO/J9GTS.
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