IVF With Endometriosis: What Are Your Real Chances?

If you’re living with endometriosis and trying to conceive, IVF/ICSI (often grouped as ART) can feel like stepping into a world of numbers that don’t match the emotional reality: hope, grief, pressure, and the exhaustion of being told to “just keep trying.”

A big frustration is the mixed messaging you may hear: “Endometriosis ruins IVF outcomes” versus “It doesn’t matter.” Recent large, real-world data from Australia and New Zealand helps clarify something crucial for you as a patient: outcomes depend a lot on whether endometriosis is the only recorded fertility issue—or whether it’s happening alongside another factor (like male factor infertility, tubal issues, ovulation problems, low egg reserve, etc.).

This matters because it changes the questions you should ask, the timeline you might plan for, and how you interpret your odds over multiple IVF cycles.

First, what “cumulative live birth rate” means for your life

Most clinics quote success “per embryo transfer” or “per cycle.” That can be misleading because many people need more than one attempt.

Cumulative live birth rate (CLBR) asks a more practical question: after several complete IVF cycles, what proportion of people have had a live birth? This is closer to how IVF actually unfolds in real life—especially with endometriosis, where you may need time to find the right protocol, manage pain flares, and navigate surgery history or ovarian cysts.

In the data below, “up to 6 complete cycles” were tracked. Importantly, the results are shown as a range because many patients discontinue treatment (for financial, emotional, medical, or logistical reasons). Your real-world odds are often somewhere between the “conservative” and “optimal” ends of that range.

The headline: endometriosis-only did not have worse IVF outcomes

When endometriosis was the only recorded infertility diagnosis, cumulative live birth rates were actually highest among the compared groups.

By six complete cycles, cumulative chances of a live birth were approximately:

• Endometriosis-only: 64% to 83%
• Endometriosis + another infertility diagnosis (“endometriosis-plus”): 54.3% to 68.7%
• Other infertility diagnoses (no endometriosis): 57.3% to 76.5%

What this means for you: if your chart says “endometriosis” and nothing else, this dataset suggests you are not automatically at a disadvantage compared with other IVF patients. That can be a relief—especially if you’ve been carrying the fear that endometriosis makes IVF “futile.”

A crucial caveat

This does not mean endometriosis is “helpful” for fertility or IVF. It likely means the comparison group (“other infertility”) includes many diagnoses that can be harder to treat, and that registry categories can’t capture every detail that shapes prognosis (like disease severity or ovarian reserve).

When outcomes were clearly worse: endometriosis-plus

If you have endometriosis and at least one additional fertility factor, outcomes were meaningfully tougher.

In this dataset, people in the endometriosis-plus group had:

• Lower likelihood of live birth than the non-endometriosis “other infertility” group (about a 5% relative reduction after adjusting for age, parity, and year of treatment).
• Higher pregnancy loss risk compared with endometriosis-only (about 46% higher relative risk).

This is one of the most actionable takeaways: if IVF hasn’t worked for you yet—or if your clinic is acting as if endometriosis is the only issue—ask whether you’ve had a thorough evaluation for additional factors that can be treated or optimized.

The pattern across cycles: most gains happen early

Many people feel pressured to decide in advance: “How many cycles will you do?” But IVF decisions often evolve with your response to stimulation, embryo development, and how your body tolerates treatment.

In this large dataset, the biggest jump in cumulative chance of live birth tended to occur in the first 2–3 complete cycles, with smaller incremental gains after that. That doesn’t mean later cycles never work—people absolutely do succeed later—but it supports a practical planning approach:

• Consider thinking in phases (e.g., reassess after 1–2 cycles, then again after 3).
• If you’re not getting embryos (or not getting euploid embryos if you’re doing PGT-A), it’s a signal to reassess strategy rather than pushing forward on autopilot.

Age is still the strongest predictor—no matter your diagnosis

If you’re in your late 30s or 40s, you already know the anxiety that comes with time. This dataset reinforces that live birth rates decline with increasing age in every group, and outcomes over age >44 were described as negligible regardless of diagnosis.

This can be painful to read, but it’s also empowering because it supports clearer decision-making. If you are 38–42, it may be worth having a more urgent, concrete conversation about:

• whether to continue trying with your own eggs,
• whether to consider embryo banking,
• whether donor eggs are something you want on the table now versus later,
• and what “stopping points” would protect your mental health and finances.

What this means if you have endometriomas or severe disease

You might be wondering: “But I have deep infiltrating endometriosis” or “I have endometriomas—does this apply to me?”

This dataset could not break outcomes down by endometriosis severity (stage) or phenotype (endometriomas vs deep disease vs superficial). So you should treat the numbers as population-level guidance, not a personalized prediction.

If you have endometriomas, the big real-world questions that affect IVF are often:

• Has surgery reduced ovarian reserve?
• Are the ovaries accessible for retrieval?
• Are you dealing with inflammation/pain that makes cycles harder to tolerate?
• Is adenomyosis also present (common, and not always diagnosed)?

Those details can shift your individual odds even if the “endometriosis-only” category looks reassuring overall.

Practical takeaways you can use at your next appointment

Here are questions that tend to change the plan in a meaningful way (and help you figure out whether you’re “endometriosis-only” or effectively “endometriosis-plus”):

• “Besides endometriosis, what other infertility factors have we formally ruled in or ruled out?” (male factor, tubal factor, ovulatory issues, diminished ovarian reserve, uterine factors like adenomyosis, etc.)
• “Based on my age and history, how many complete cycles do you recommend before we reassess strategy?” Ask them to define what would trigger change: poor response, low fertilization, poor blast rate, repeated transfer failure, pregnancy loss.
• “What is your plan to address pregnancy loss risk in my situation?” This is especially important if you have endometriosis-plus, recurrent miscarriage, or suspected uterine factors.
• “If we don’t have success after 2–3 cycles, what are the next-step options?” (protocol changes, surgical considerations, embryo banking, different lab strategies like ICSI, donor eggs/sperm, gestational carrier in select cases)

Keep notes. Ask for your numbers in writing (AMH, AFC, eggs retrieved, mature eggs, fertilization rate, blast rate, embryo grades, transfer details). Your story across cycles is often more informative than any single “average success rate.”

Reality check: what these numbers can’t promise

You deserve hope, but you also deserve honesty.

These cumulative percentages are not your personal odds. They’re averages across a large registry, and they’re presented as a range because discontinuing IVF is common—and not random. People stop for many reasons, including poor prognosis, which can pull “real-life” outcomes toward the conservative end.

Also, this dataset doesn’t tell you:

• whether excision surgery before IVF helps or harms outcomes in specific subgroups,
• how adenomyosis changes the picture,
• or how outcomes vary by endometriosis stage/phenotype.

So use this information the way it’s most powerful: to set expectations, plan decision points, and push for a full fertility work-up—especially if something isn’t adding up.