HBOT for Fertility in Singapore
Hyperbaric oxygen therapy is being studied as an adjunct in selected fertility settings. It is not a replacement for IVF, ICSI, ovulation treatment, surgery or specialist reproductive care, and fertility outcomes cannot be guaranteed.
Why HBOT is being studied in fertility
In brief, HBOT raises the amount of oxygen dissolved in plasma and can temporarily increase oxygen delivery to tissues. The mechanism, pressures, session structure, contraindications and risks are set out in full on our hyperbaric oxygen therapy in Singapore page.
Fertility is not an established indication. HBOT has recognised roles in conditions such as decompression illness and certain radiation injuries; reproductive applications remain an area of research rather than standard treatment.
Potential mechanisms under investigation include changes in tissue oxygenation, vascular signalling and oxidative-stress pathways. These biological effects do not automatically translate into a higher live-birth rate, which is why clinical evidence and specialist fertility care remain essential.
What has been studied?
Resistant thin endometrium
A 2023 reproductive-medicine study reported improved endometrial parameters and pregnancy outcomes in a selected group receiving HBOT during frozen-embryo-transfer treatment. This is encouraging but does not establish HBOT as routine treatment for thin endometrium.
Poor ovarian response
A 2025 pre-post cohort of 41 women reported improvements in oocyte yield and embryo-related measures after HBOT. Because there was no randomized control group, larger controlled trials are needed before firm conclusions can be drawn.
Sperm parameters
A 2025 systematic review and meta-analysis found improvements in several sperm measures and reported higher clinical pregnancy rates when HBOT was added to conventional treatment. The authors also noted a small evidence base and possible publication bias.
HBOT around IVF or FET
Human research has explored HBOT in women undergoing assisted reproduction, particularly patients with poor prognosis, resistant thin endometrium or poor ovarian response. A much earlier IVF pilot study found HBOT was tolerated but specifically concluded that further research was required to determine efficacy.
If HBOT is considered, timing should be coordinated with the fertility specialist. Ovarian stimulation, egg retrieval, embryo transfer and medication schedules should not be altered because of HBOT without the treating reproductive physician's agreement.
- Review the fertility diagnosis rather than treating “fertility” as one condition.
- Clarify whether the goal relates to ovarian response, endometrium, male factor or general recovery.
- Coordinate treatment timing with IVF / ICSI / FET protocols.
- Stop and reassess if pregnancy occurs or if the fertility team advises against further sessions.
HBOT and sperm quality
Male-factor infertility is currently the area with the strongest pooled human evidence for HBOT, but it is still not standard first-line treatment. Studies have reported changes in motility, concentration, morphology, DNA fragmentation and oxidative-stress markers in selected patients.
These findings do not mean that every man with infertility should undergo HBOT. Semen analysis, hormonal assessment, examination for varicocele or obstruction, medication review, lifestyle factors and specialist evaluation remain more fundamental.
How we assess suitability
Before any fertility-related HBOT programme, a doctor reviews your medical history, fertility diagnosis, current medications and the stage of any assisted-reproduction cycle. We also check for standard HBOT contraindications and factors that may increase ear, sinus or pulmonary risk.
When we would be cautious
- Established pregnancy without a separate medically accepted HBOT indication.
- Untreated pneumothorax or other standard HBOT contraindications.
- Acute ear or sinus problems that prevent pressure equalisation.
- Unclear fertility diagnosis where investigation should come first.
- Expectation that HBOT can guarantee implantation, pregnancy or live birth.
What happens during a session?
Before
Medical screening and confirmation that the timing is compatible with your fertility plan. Avoid bringing restricted items into the chamber and follow staff safety instructions.
During
The chamber is gradually pressurised. You may feel ear pressure similar to an aircraft ascent or descent. Session pressure and duration are prescribed according to clinical assessment.
After
Most people resume normal activities. Temporary ear pressure, fatigue or light-headedness can occur. Report persistent ear pain, breathing symptoms or unusual visual changes.
HBOT for fertility FAQs
Does HBOT improve IVF success rates?
Some studies report encouraging reproductive outcomes, but the evidence is not strong enough to say that HBOT reliably improves IVF success or live-birth rates. It should be considered investigational and adjunctive.
Can HBOT improve a thin endometrium?
A 2023 study in resistant thin endometrium reported improvements, but this does not establish HBOT as standard treatment. Your fertility specialist should first evaluate the cause and conventional options.
Can HBOT improve egg quality or ovarian reserve?
Recent observational data in poor ovarian responders are promising, but HBOT has not been proven to reverse ovarian ageing or restore ovarian reserve. AMH and oocyte measures should be interpreted carefully.
Can HBOT improve sperm quality?
A 2025 systematic review suggests possible improvements in several sperm parameters when HBOT is added to conventional treatment. More high-quality trials and longer-term fertility outcomes are still needed.
Can I have HBOT after embryo transfer?
Do not assume that treatment should continue after transfer. Timing should be discussed with your fertility specialist. Once pregnancy is established, elective fertility HBOT is generally avoided unless there is a separate medical indication and the benefits outweigh the risks.
Is HBOT safe?
HBOT is generally well tolerated when appropriately prescribed, but risks include ear or sinus barotrauma, temporary vision changes, oxygen-related effects and, rarely, more serious complications. Suitability screening is essential.
Selected references
- Chen J, et al. Hyperbaric oxygen therapy: a possible choice for patients with resistant thin endometrium during frozen embryo transfer treatments. Reproductive Biology and Endocrinology. 2023. PubMed.
- Hyperbaric oxygen therapy improves oocyte yield and embryo quality in poor ovarian responders: a pre-post cohort study. 2025. PubMed.
- Liu B, et al. Hyperbaric oxygen therapy for male infertility: a systematic review and meta-analysis on improving sperm quality and fertility outcomes. Medical Gas Research. 2025. PubMed.
- Van Voorhis BJ, et al. Hyperbaric oxygen and ovarian follicular stimulation for in vitro fertilization: a pilot study. Fertility and Sterility. 2005. PubMed.
- Narrative minireview of the current status of hyperbaric oxygen therapy for pregnant women. 2023. PubMed.
This page is educational and does not replace assessment by a fertility specialist. Fertility-related HBOT is not presented as an established indication or a guaranteed way to improve implantation, pregnancy or live-birth rates. Content reviewed by the medical team at Aquila Medical Center, Singapore. Last reviewed: 27 August 2026.
Considering HBOT alongside fertility treatment?
Bring your fertility diagnosis, medication list and current IVF / ICSI / FET plan so the doctor can assess whether HBOT is reasonable to discuss with your fertility team.