Should every PCOS patient do freeze-all?
Not mandatory, but strongly recommended by most specialists due to OHSS risk. Discuss with Dr. Tank whether your risk level warrants it.
Treatment Guides
PCOS is a leading cause of female infertility. In IVF, high egg counts are common—but quality and health management are key. This guide covers the right strategy and how to protect yourself during treatment.
PCOS ovaries contain many small follicles and respond with more egg formation than usualto IVF hormones. You may retrieve 15–30+ eggs, far above the average 10–15. However, not all these eggs are mature or of good quality. PCOS patients often have 20–40% lower fertilisation rates and more chromosomal abnormalities. The numbers are impressive, but 'quantity over quality' is the PCOS dilemma.
Ovarian hyperstimulation syndrome (OHSS) occurs in 5–10% of general IVF patients but in 30–50% of PCOS patients. Mild OHSS causes bloating, mild pain, nausea. Moderate to severe OHSS causes severe abdominal pain, vomiting, diarrhoea, rapid weight gain (>2 kg/day), reduced urine output, and shortness of breath. Severe OHSS is a medical emergency.
Prevention strategies: lower starting hormone doses, close monitoring with frequent scans, downregulation with antagonists (rather than agonists), trigger injection with agonist (rather than hCG), based on follicle response. A new strategy that is emerging is PPOS (progesterone primed ovarian stimulation), that controls OHSS risk by allowing an agonist trigger with fewer total number of injections to be taken.
Freeze-all strategy: if OHSS is a risk, avoid fresh transfer; freeze all embryos and return for FET once recovered
Many specialists recommend PCOS patients use freeze-all: retrieve eggs, culture embryos to day 5, freeze all, and transfer in a separate medicated FET cycle. This approach:
Eliminates OHSS risk in the stimulation cycle
Allows PGT testing to select chromosomally normal embryos (improving success) in selected women.
Gives time to manage insulin resistance and optimise health before transfer
50–70% of PCOS patients have insulin resistance, which worsens egg quality and increases miscarriage risk and increases chances of adverse outcomes such as hypertension and diabetes in pregnancy. Pretreatment is crucial:
Lifestyle: low glycemic index diet, moderate cardio exercise, stress management
Sleep and stress: both directly impact insulin and ovarian functionInositol supplementation: myo-inositol (2–4g daily) improves ovulation, egg quality, and insulin sensitivity
Metformin: often prescribed 500 to 1000 mg twice daily; improves ovulation rates and may improve egg quality
Some women may need to use GLP-1 drugs to optimize their health before embryo transfer. In such situations, there will have to be a two month gap between the last GLP-1 use and embryo transfer.
Despite the challenges, PCOS patients often achieve good IVF outcomes because they retrieve many eggs. If 20 eggs retrieve with 60% normal fertilisation, you have 12 embryos. Even if only 40% grow to blastocyst stage, (a realistic PCOS estimate), you still have 4–5 embryos to transfer. This is a strong position. We often plan for single blastocyst transfer in PCOS women, especially those who are at a high BMI or have other medical comorbidity.
Q: Should every PCOS patient do freeze-all?
A: Not mandatory, but strongly recommended by most specialists due to OHSS risk. Discuss with Dr. Tank whether your risk level warrants it.
Not mandatory, but strongly recommended by most specialists due to OHSS risk. Discuss with Dr. Tank whether your risk level warrants it.