Why IVF Fails & What To Do Next
Second Attempt Success Guide (India)
If your IVF cycle didn't work, you're likely carrying a weight of disappointment, confusion, and urgent questions. A failed IVF cycle is more common than it's talked about— roughly 40–55% of first attempts fail. That's not a failure of you. It's a biological process with real variables — most of which can be investigated and addressed.
This guide is designed as a decision tool, not just information. It explains what likely went wrong, what tests to get before the next cycle, and exactly what to do next — including when to consider changing clinics.
Why IVF Fails — The 7 Main Causes
IVF failure usually has a cause — even if your clinic hasn't identified it yet. These are the 7 categories where failures originate, roughly in order of frequency.
Poor Egg Quality
Sperm Quality Issues
Embryo Quality Problems
Implantation Failure
Uterine Issues
Chromosomal Abnormalities
Lab & Clinic Factors
| Cause | Frequency | Primary Test | Effectively Addressable? |
|---|---|---|---|
| Egg chromosomal abnormality | Most common (esp. >35) | PGT-A on embryos | Partially — PGT selects viable ones; donor eggs circumvent completely |
| Implantation failure | 25–30% of failures | ERA test + Hysteroscopy | Yes — most causes are treatable |
| Sperm DNA fragmentation | Underdiagnosed; ~15–25% | DNA Fragmentation Index | Often yes — antioxidants, ICSI, IMSI |
| Poor embryo development | Common when few eggs | Blastocyst rate; PGT-A | Yes — protocol change; lab shift |
| Uterine issues | 10–15% of failures | Hysteroscopy | Yes — polyps/fibroids surgically removed |
| Thrombophilia / clotting | Rare; often missed | Thrombophilia screen | Yes — LMWH during next cycle |
| Lab quality / technique | Underreported | Blastocyst rate, second opinion | Yes — change clinic |
What Should You Do Next? — Personalised Guide
Answer 2–4 questions about your cycle and we'll show you the specific investigations and next steps most relevant to your situation.
🗺️ What Should You Do Next?
Step 1 of 2–4How many IVF cycles have you had so far?
IVF Success Rate for Second and Third Attempts — India Data
Cumulative IVF success rates are substantially higher than per-cycle rates. A failed first cycle does not predict failure in the second — particularly when the protocol is adjusted and investigations done.
| Cycle Attempt | Under 35 | Age 35–37 | Age 38–40 | Age 41+ | Note |
|---|---|---|---|---|---|
| Cycle 1 (Fresh Transfer) | 45–55% | 35–45% | 25–35% | 15–25% | First attempt baseline |
| Cycle 2 (FET or Fresh) | 65–75% | 52–65% | 40–55% | 25–40% | Cumulative; protocol adjusted |
| Cycle 3 (FET or Fresh) | 75–85% | 65–75% | 50–65% | 35–50% | Cumulative; most reach decision point |
| Cycle 4+ (with workup done) | 80–90% | 70–80% | 55–70% | 40–55% | Assumes proper investigation done between cycles |
* Cumulative pregnancy rates per treatment episode (including FET from banked embryos). Based on ICMR ART Registry, ESHRE published data, and Indian IVF chain outcomes. Individual results vary significantly by diagnosis and clinic.
💡 Why cumulative rates increase with each cycle
Two reasons: (1) The doctor knows your response profile after cycle 1 and can optimise the next protocol. (2) If frozen embryos are available from the first stimulation, subsequent transfers (FET) cost far less (₹30,000–₹60,000 vs ₹1,00,000+) and are often done in a better uterine preparation cycle.
⚠️ The same protocol repeated is the biggest preventable mistake
The improvement from cycle 1 to cycle 2 assumes something changed — medication dose, stimulation protocol, trigger type, or transfer timing. If the same protocol is repeated without investigation, the second cycle gives you no useful new information and the same result is predictable.
Tests to Ask For After Failed IVF
Not every test is needed by every patient. The right investigations depend on what specifically went wrong. Use this as a reference for your consultation.
ERA Test
₹15,000–₹25,000Who needs it: Good-quality embryos transferred, but no pregnancy resulted (1–2 times)
Detects: Whether your uterine lining is receptive at the time of transfer — or if the embryo was transferred too early or too late (Displaced Implantation Window)
Timing: Before next FET; done in a mock cycle. About 30% of recurrent implantation failure cases have a displaced window.
DNA Fragmentation Test (DFI)
₹5,000–₹10,000Who needs it: Fertilisation failure, poor blastocyst development, or recurrent early pregnancy loss
Detects: Damage to DNA within sperm cells — not visible on standard semen analysis. DFI >25% is associated with fertilisation failure, poor embryo quality, and miscarriage.
Timing: Before any cycle where sperm quality may be contributing. Simple semen test.
Hysteroscopy
₹10,000–₹30,000Who needs it: All recurrent implantation failure cases (especially if not done before first cycle)
Detects: Polyps, submucosal fibroids, uterine septum, Asherman's adhesions, or abnormal lining. Can often be treated in the same procedure.
Timing: Before next embryo transfer. Outpatient procedure, usually under light sedation.
Karyotyping (Both Partners)
₹3,000–₹8,000 per personWho needs it: Recurrent pregnancy loss, repeated cycle failures, azoospermia, or advanced maternal age
Detects: Chromosomal structural abnormalities in either partner that affect embryo viability
Timing: Once, permanently useful. Blood test. Particularly important if multiple failed cycles show consistent poor embryo quality.
Thrombophilia Screen
₹3,000–₹8,000Who needs it: Unexplained implantation failure, recurrent miscarriage, or personal/family history of blood clots
Detects: Blood clotting disorders (antiphospholipid syndrome, Factor V Leiden, MTHFR mutations) that can prevent implantation by reducing blood flow to the uterus
Timing: Once; blood test. If positive, low-molecular-weight heparin during next IVF is often prescribed.
AMH + AFC Reassessment
₹800–₹1,500Who needs it: Poor stimulation response in previous cycle, or if >6 months since last test
Detects: Current ovarian reserve — AMH changes over time. Guides stimulation protocol and dose for the next cycle.
Timing: Day 2–3 of any cycle. Often worth repeating if the last result was more than 6 months ago.
PGT-A (Embryo Genetic Testing)
₹30,000–₹60,000 add-onWho needs it: Women over 37 with implantation failure, recurrent miscarriage, or poor embryo development
Detects: Chromosomal abnormalities in embryos before transfer. Identifies the viable (euploid) embryos and removes aneuploid ones from the transfer queue.
Timing: During embryo culture phase of IVF cycle. Adds 1–2 weeks to the cycle timeline.
Not sure which tests you need?
Use the decision tool above to get personalised test recommendations based on your specific failure pattern.
How to Improve Your Second IVF Success
Between your failed cycle and the next one, you have a window to address modifiable factors. These are the ones with the strongest evidence:
🩺Medical Optimisation
Stimulation type, medication dose, trigger type — all should be reviewed and adjusted based on previous response.
If age 37+ or recurrent failure — chromosomal testing before transfer removes the biggest single variable.
If implantation failure was the issue — ERA synchronises the transfer to your uterine window, improving implantation by ~30%.
Fresh transfers in hyperstimulated uteri have lower implantation rates. Freezing embryos and transferring in a separate, calmer cycle often improves outcome.
TSH target of <2.5 mIU/L — not just "normal range". Subclinical hypothyroidism at TSH 2.5–4.5 is associated with implantation failure.
Low progesterone on the day of transfer (<10 ng/mL in some protocols) is a correctable cause of implantation failure often overlooked.
🌿Lifestyle & Supplement Optimisation
Supports mitochondrial function in eggs. Best evidence in poor responders and women over 35. Start 90 days before next egg retrieval.
Every BMI point above 25 reduces IVF success by 2–3%. A 2–3 month delay to reach optimal BMI often improves outcomes more than the delay costs.
Antioxidants (zinc, selenium, vitamin C, vitamin E, CoQ10) for 70–90 days. For DFI >30%: urologist review, varicocele assessment.
Smoking reduces IVF success by ~50% by damaging egg DNA. Three months of cessation measurably improves outcomes.
Deficiency is associated with lower implantation rates. Simple blood test. Supplement if below optimal.
Whole grains, fish, olive oil, legumes, vegetables. Associated with higher IVF success in published studies. Avoid ultra-processed foods and trans fats.
When to Consider Changing Your IVF Clinic
A second opinion is not disloyal— it's rational. After one failed cycle, a fresh perspective is useful. After two cycles with the same clinic and no protocol change, it's essential. Look for these red flags:
Every failed cycle should trigger a specific protocol review. If the recommendation is "let's try again the same way," ask why.
Offering another cycle without ERA test, hysteroscopy, or DNA fragmentation review (where indicated) is a quality concern.
Your consultant should be able to clearly explain their hypothesis about why the cycle failed — even if uncertain — and what changes to make.
PRP, endometrial scratching, and IVIG are not proven interventions for most patients. A clinic heavily pushing these after first failure may be commercially motivated.
Any clinic unwilling to share their success rates for your age group — not just their overall average — is hiding relevant information.
Ask: "What percentage of your patients' fertilised eggs develop to blastocyst?" Below 40% is a concern. Top labs reach 55–65%.
✅ What a good clinic response to failure looks like
- A clear explanation of what likely caused the failure (even if uncertain)
- A written outline of what will change in the next cycle and why
- Proactive recommendations for further investigation before proceeding
- Willingness to share their age-specific success rates and blastocyst development rates
- No pressure to start again immediately without an investigation window
Frequently Asked Questions
Why does IVF fail the first time?
The most common reasons are: embryo chromosomal abnormalities (accounts for 50–60% of failures in women over 35), implantation failure due to uterine factors or timing, poor stimulation response, fertilisation failure from sperm quality issues, and embryos not reaching blastocyst stage. In many first cycles, the failure is caused by chromosomally abnormal embryos — which is biological, not a failure of the treatment or the clinic. The second cycle, with adjusted protocol and investigation, often yields better information and results.
Can IVF work after failure?
Yes — absolutely. A failed first IVF cycle does not predict failure in the next. Cumulative success rates after 3 cycles are substantially higher than per-cycle rates: 75–85% for women under 35, 60–75% for 35–38, and 42–60% for 39–41. The key is adjusting the protocol based on what went wrong, adding investigations that weren't done the first time, and addressing identified issues before starting again.
How soon can I try IVF again after failure?
Most clinics recommend waiting one full menstrual cycle (4–6 weeks) after a failed fresh cycle before starting another stimulation. For a frozen embryo transfer (FET) from already-banked embryos, the wait is usually just one cycle. The investigation and protocol planning in this gap are the most productive use of the waiting period — not just physical recovery.
Is the second IVF attempt more successful?
Yes, for most patients. Cumulative success after 2 cycles is substantially higher than after 1 cycle. Two reasons: (1) The doctor knows your response profile and can optimise the next protocol. (2) If frozen embryos are available from the first stimulation, the second attempt is a frozen transfer — often in a better uterine preparation cycle at a fraction of the cost. The increase from cycle 1 to cycle 2 success is typically 15–25 percentage points cumulatively.
Should I change my doctor after failed IVF?
Not necessarily after one failure — but a second opinion is always reasonable, and after two cycles with the same protocol, it's the highest-evidence-supported next step. Red flags suggesting a change: the same protocol was repeated without change, no investigation was done after failure, the clinic couldn't explain what happened, you're being pushed to re-start immediately without tests, or the clinic doesn't publish age-specific success rates.
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✍️ About This Guide
Written by the FertilityNetwork Editorial Team. Reviewed by ICMR-registered reproductive medicine specialists. Based on published clinical evidence (ESHRE, ICMR, ASRM guidelines). Last updated: April 2026.
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