Water birth safety: labor immersion versus delivery

What does the evidence say about water birth during pregnancy?

1. ACOG says first-stage water immersion may shorten labor and reduce spinal or epidural analgesia use for healthy patients with uncomplicated pregnancies from 37 weeks through 41 weeks and 6 days. It recommends birth on land because second-stage and underwater-delivery evidence remains insufficient. 1
2. ACOG identifies rare but serious reports after underwater delivery, including Pseudomonas or Legionella infection, water aspiration, and umbilical cord avulsion. It requires rigorous protocols for candidate selection, tub maintenance, infection control, monitoring, and prompt removal if maternal or fetal concerns develop. 1
3. A 2024 meta-analysis of 52 randomized and nonrandomized studies found no higher pooled maternal-infection odds with water birth than land birth, but did find higher odds of cord avulsion. Most outcome estimates came from observational studies and unadjusted pooling, leaving selection and protocol differences as important limitations. 2
4. The POOL cohort compared 60,402 selected low-risk British patients who entered a pool during labor. Adjusted maternal anal-sphincter injury and the neonatal composite outcome assessed in a subset were no higher after water birth than birth after leaving the pool. Allocation was not randomized, so selection differences remain possible. 3
5. A U.S. neonatal-health review distinguishes first-stage immersion from underwater delivery. It reports observational comfort and analgesia findings for first-stage immersion, while second-stage concerns include infection, aspiration, and cord avulsion, and notes that AAP and ACOG recommend limiting immersion to first-stage labor in selected term pregnancies. 4

Is water birth safe in each trimester?

• First trimester. Water birth is a delivery-setting decision, not an early-pregnancy procedure. If it matters to you, ask whether your planned hospital or birth center offers first-stage immersion, underwater delivery, both, or neither, because policies differ.
• Second trimester. Review whether the facility has written candidate criteria, tub-cleaning and water-quality protocols, fetal monitoring, trained staff, and a rapid way to leave the pool. Eligibility can change if medical or obstetric complications develop.
• Third trimester. ACOG's candidate range for first-stage immersion is an uncomplicated pregnancy from 37 weeks through 41 weeks and 6 days. Confirm when you must exit the pool, how fetal concerns are monitored, and whether the planned birth itself will occur on land.