Is Hyperbaric Oxygen Therapy Safe for Pregnancy?

Hyperbaric oxygen therapy (HBOT) comes up often among expectant mothers looking for anything that might support a healthy pregnancy. It’s a fair question to ask — but the honest answer isn’t the one most clinics give.

Is hyperbaric oxygen therapy safe during pregnancy?

For routine or wellness purposes, the clinical answer is no — not because HBOT has been proven harmful, but because it has never been shown to be safe for elective use in pregnancy, and there are real theoretical concerns. Pregnancy is treated as a contraindication to elective HBOT, especially in the first trimester. The concerns clinicians weigh include oxygen toxicity, the possibility of effects on fetal development, and changes to placental blood flow. The honest bottom line is that the safety data simply isn’t there: clinical trials of HBOT routinely exclude pregnant participants, which tells you how the field views the risk-benefit math.

When data is thin and the patient is a developing baby, the responsible default is caution — not “probably fine.”

When is HBOT actually used during pregnancy?

There’s a narrow set of genuine emergencies where the benefit to mother and baby outweighs the risk, and HBOT may be used despite the pregnancy. These include:

• Carbon monoxide poisoning — the best-established indication, because CO is especially dangerous to a fetus.
• Gas gangrene (a severe, fast-moving tissue infection).
• Decompression sickness (a diving emergency).

The key point: every one of these is an acute, life-threatening event handled in a hospital alongside an OB and a maternal-fetal medicine team. None of them looks like an elective course of outpatient sessions for general wellness or for conditions like migraines or fatigue. That distinction matters — it’s the line between emergency medicine and elective care.

What about the older studies on HBOT and fetal growth?

If you go looking, you’ll find pages citing research on HBOT for fetal growth restriction and placental insufficiency. It’s worth being straight about what that research is. There was a legitimate line of inquiry decades ago — including work published in respected journals — exploring whether extra maternal oxygen could help babies with poor placental function. It was a real question, not quackery.

But it never matured into accepted practice. Much of the supporting material is 30-to-45-year-old conference proceedings from a small number of groups, and modern obstetrics does not use HBOT this way. The accurate framing is: studied decades ago, never validated, and not part of current standard care. Anyone presenting that older literature as “proven” is overstating it.

“I want HBOT — what should I do while I’m pregnant?”

Wait until postpartum for HBOT itself. In the meantime, there are supportive options that are far better suited to pregnancy, and we’re glad to talk through them. After delivery, HBOT becomes a reasonable conversation again — and the postpartum window is actually where a lot of mothers see the most value.

HBOT after delivery: the postpartum window

Once you’ve delivered, the calculus changes completely — there’s no fetus to protect, and recovery becomes the goal. HBOT is being explored as a complementary support for postpartum recovery, including healing after a cesarean or perineal repair, where improved tissue oxygenation may aid wound healing and help manage inflammation. Some researchers are also looking at oxygen-based therapies in the context of postpartum mood, though that work is still early and HBOT is not a treatment for postpartum depression.

We’ll be honest about what’s well-supported and what’s still investigational, and we’ll never push sessions you don’t need. If you’re local to Phoenix and curious, the no-cost consult below is the place to start.

Safer supportive options during pregnancy

Red light therapy. Used within appropriate parameters and away from the abdomen, red light therapy is non-invasive and generally well tolerated. Pregnancy-specific data is limited, so it’s a “talk to your provider first” option — we go through the parameters with you. Read more about red light therapy in pregnancy →

Massage therapy. Prenatal massage can ease the muscle tension, joint discomfort, swelling, and sleep disruption that come with pregnancy — provided it’s done by a licensed therapist trained in prenatal work, using safe positioning. We offer massage in-office with our licensed massage therapist.

Frequently asked questions

This article is educational and isn’t a substitute for medical advice. Decisions about any therapy during pregnancy should be made with your OB or maternal-fetal medicine provider.