Why Clinic Selection Matters More Than You Think
IVF success rates across clinics in the same city can vary by 15–25 percentage points — and that gap is not explained by luck. It reflects real differences in embryology lab quality, stimulation protocols, genetic testing capabilities, and the clinical judgment of individual physicians.
The choice of clinic may be the most consequential variable within your control.
How to Access and Read CDC & SART Data
Before you speak to a single clinic, pull the publicly available data. There are two primary sources, and they are not the same.
SART (Society for Assisted Reproductive Technology)
SART reporting is voluntary — member clinics opt in and submit detailed outcome data to the SART clinic finder. Because participation is voluntary, not all clinics are included. However, SART data tends to be more granular: it breaks down cycles by diagnosis, cycle type, and embryo source in ways the CDC report does not.
CDC ART Surveillance Report
Reporting to the CDC is mandatory under federal law (the Fertility Clinic Success Rate and Certification Act of 1992). Every ART clinic in the United States must report outcome data, which makes the CDC ART Surveillance Report the only complete, government-verified source of clinic-level success rates. If a clinic performs ART and does not appear in the CDC report, that is itself a red flag.
The most important rule when reading either database: always filter to your own age bracket and your primary diagnosis. Aggregate success rates — a single headline percentage — are nearly meaningless. A clinic serving a large share of donor-egg patients and young, well-prognosis women will show inflated aggregate rates compared to a clinic serving older patients or complex cases. The only number that matters is the live birth rate per intended egg retrieval for patients whose profile matches yours.
Start with the CDC Data — But Read It Correctly
What the CDC Report Includes
- Live birth rates per intended egg retrieval by female age group
- Cycle counts (number of retrievals per year)
- Donor egg vs. own-egg breakdown
- Percentage of cycles using preimplantation genetic testing (PGT)
Common Misreadings
Mistake 1: Comparing raw success rates without controlling for patient mix. A clinic that selects only the most favorable patients (young women, good ovarian reserve) will show higher rates than a clinic that accepts all comers. Ask about their cancellation rate — how often they start stimulation and cancel before retrieval due to poor response.
Mistake 2: Using clinical pregnancy rate instead of live birth rate. A clinical pregnancy (fetal heartbeat detected) can still result in miscarriage. Live birth rate is the only outcome that matters.
Mistake 3: Looking only at the "under 35" data. If you're 38 or older, look at the 38–40 or 41–42 age brackets. Clinic performance at older ages varies more than at younger ages.
Mistake 4: Ignoring cycle volume. A clinic that reports a 70% live birth rate on 40 cycles may have a flukily good year. A clinic showing 55% on 600 cycles has a more statistically meaningful result.
12 Questions to Ask Any Fertility Clinic
1. What is your live birth rate per retrieval for patients my age — using my own eggs?
The CDC publishes this. Clinics should be able to cite their own numbers by age bracket. If they quote a number significantly higher than what appears in the most recent CDC report, ask why.
2. What percentage of your cycles use a GnRH antagonist protocol vs. long lupron?
This is a technical question, but it reveals protocol flexibility. Modern clinics predominantly use antagonist protocols, which have similar efficacy but lower OHSS risk and faster cycle starts. A clinic still running mostly long lupron cycles may be behind the curve.
3. What is your blastocyst development rate?
Of fertilized embryos that survive to Day 3, what percentage reach the blastocyst stage (Day 5/6)? A rate below 40% warrants explanation. High-quality labs typically achieve 50–65% (a benchmark from leading embryology labs).
4. Do you routinely offer preimplantation genetic testing for aneuploidies (PGT-A)?
PGT-A screens embryos for chromosomal abnormalities before transfer, reducing miscarriage risk and improving implantation rates — especially for women over 37 or with prior failed transfers. It's not right for every patient, but every clinic should offer it and be able to explain the evidence.
5. Who will be my primary physician throughout treatment — and will that person perform my retrieval?
Large clinic networks sometimes use different physicians for monitoring appointments and retrieval procedures. Continuity of care matters. Know who's making the decisions.
6. What is your fresh vs. frozen embryo transfer policy?
The evidence increasingly favors frozen embryo transfers (FET) over fresh transfers — a practice called "freeze-all." FET allows the uterine lining to recover from stimulation before implantation, typically improving outcomes. Ask what percentage of their transfers are FET vs. fresh, and whether they recommend freeze-all for patients like you.
7. What is your policy on elective single embryo transfer (eSET)?
Transferring multiple embryos increases the risk of twins, which carry substantially higher maternal and neonatal complication rates. Leading reproductive medicine organizations recommend eSET for most patients under 38. Clinics willing to transfer multiple embryos for convenience rather than clinical indication are a red flag.
8. What embryology lab metrics can you share?
A confident, high-quality embryology program should be able to share:
- Fertilization rates (normal: 60–75% for ICSI; 50–65% for conventional IVF — per ASRM guidelines)
- Blastulation rates (50–65% is the benchmark from leading embryology labs)
- Embryo survival rates after biopsy (for PGT)
- Cryosurvival rates after vitrification
9. How do you manage ovarian hyperstimulation syndrome (OHSS)?
Severe OHSS is largely preventable with GnRH agonist trigger (instead of hCG) and freeze-all protocols. Ask what percentage of their patients experience moderate or severe OHSS, and what their protocol is to prevent it.
10. What does your pricing include — and what doesn't it?
The headline IVF price often excludes:
- Monitoring appointments
- Anesthesia for retrieval
- Embryo freezing and storage
- PGT-A biopsy and lab fees
- Frozen embryo transfer cycle
- Medications (often $3,000–$6,000 alone)
Request a fully itemized cost estimate before committing.
11. Do you have an LGBTQ+ affirming practice?
If this applies to you: ask specifically about their experience with same-sex female couples (reciprocal IVF), same-sex male couples using gestational carriers, single patients by choice, and non-binary/trans patients who may have non-standard anatomy or hormone histories. Ask if their intake forms and staff communication reflect an inclusive practice.
12. What is your cancellation rate?
Clinics that don't carefully screen patients may start stimulation and cancel cycles when ovarian response is poor. A high cancellation rate (> 10–15%) may indicate suboptimal patient selection or stimulation management.
Lab Accreditation — The Questions Clinics Don't Want You to Ask
Embryology lab quality is the single biggest driver of clinic outcomes that the CDC data can't directly capture. Two clinics can report similar live birth rates while operating labs of vastly different quality — because lab differences show up in edge cases and complex patients first.
CAP Accreditation (College of American Pathologists)
CAP accreditation is the gold standard for embryology lab quality. CAP-accredited labs undergo rigorous on-site inspections by peer experts every two years, covering equipment calibration, quality control procedures, staff competency, and documentation practices. CAP accreditation is voluntary — not all labs pursue it. Ask directly: "Is your embryology lab CAP-accredited?"
CLIA Certification
CLIA (Clinical Laboratory Improvement Amendments) certification is federally required for all clinical labs. This is a baseline, not a distinction — every lab must have it. Do not let a clinic use CLIA certification as evidence of quality. CAP accreditation is the relevant differentiator.
Embryologist Credentials and Experience
Ask: How many embryologists does the lab employ? What are their credentials and how long have they been working in ART? Is there a dedicated senior embryologist in the lab daily, or is coverage shared with other sites in a network? A high-volume lab with experienced, credentialed embryologists will consistently outperform an understaffed one — even if both report comparable aggregate success rates.
A Real Comparison Example
Suppose you're comparing two clinics in the same metro area. Here's how the questions above translate into a meaningful decision:
| Clinic A | Clinic B | |
|---|---|---|
| LBR under 35 (own eggs) | 48% | 52% |
| Cancellation rate | 9% | 7% |
| Blastulation rate | 65% | 70% |
| Lab accreditation | CAP-accredited | CLIA only |
| Freeze-all policy | Yes | Case-by-case |
| eSET policy | Recommended for all under 38 | "Patient's choice" |
At first glance, Clinic B's 52% live birth rate looks better than Clinic A's 48%. But the analysis doesn't end there.
Clinic B's lower cancellation rate (7% vs. 9%) and higher blastulation rate (70% vs. 65%) suggest a slightly stronger embryology program in aggregate — consistent with the live birth rate difference. However, Clinic B holds only CLIA certification while Clinic A is CAP-accredited. For patients with complex histories, repeated failures, or older age, the CAP-accredited lab may be the more defensible choice.
Clinic B's "patient's choice" eSET policy is also a yellow flag. Guidelines from ASRM recommend eSET for most patients under 38. A clinic that defers to "patient's choice" without active clinical guidance may be accommodating preference over evidence — which can elevate twin risk without improving cumulative live birth rates.
The right answer depends on your individual profile, but this is exactly the kind of comparison the 12 questions are designed to surface.
Frequently Asked Questions
Q: What is the most important metric to compare when evaluating fertility clinics? A: The live birth rate per intended egg retrieval, filtered to your own age bracket and cycle type (own eggs vs. donor eggs), is the most important metric. Aggregate success rates are nearly meaningless because a clinic serving predominantly young, well-prognosis patients will show inflated rates compared to one seeing complex cases. Always filter to patients whose profile matches yours in the CDC ART Surveillance data or SART clinic finder.
Q: What is the difference between SART and CDC reporting? A: CDC reporting is mandatory under federal law (the Fertility Clinic Success Rate and Certification Act of 1992) for every ART clinic in the US, making it the only complete, government-verified source of clinic-level data. SART reporting is voluntary — member clinics opt in and submit more granular breakdown data (by diagnosis, cycle type, and embryo source), but not all clinics participate. If a clinic performs ART and does not appear in the CDC report, that is itself a red flag.
Q: What blastocyst development rate indicates a high-quality embryology lab? A: Leading embryology labs typically achieve blastocyst development rates of 50–65% (the percentage of fertilized embryos that survive from Day 3 to the blastocyst stage at Day 5/6). A rate below 40% warrants explanation. ASRM guidelines note normal fertilization rates of 60–75% for ICSI and 50–65% for conventional IVF.
Q: Why is CAP accreditation more meaningful than CLIA certification for embryology labs? A: CLIA certification is federally required for all clinical labs and is a baseline, not a distinction. CAP (College of American Pathologists) accreditation is voluntary and involves rigorous on-site inspections every two years covering equipment calibration, quality control, staff competency, and documentation practices. For patients with complex histories, repeated failures, or older age, a CAP-accredited lab may be the more defensible choice.
Q: What should I look for in a clinic's single embryo transfer (eSET) policy? A: ASRM recommends elective single embryo transfer for most patients under 38 because transferring multiple embryos substantially increases twin risk without improving cumulative live birth rates. A clinic whose policy is "patient's choice" without active clinical guidance may be accommodating patient preference over evidence. This is a yellow flag — particularly for younger, good-prognosis patients for whom the evidence strongly supports eSET.
Red Flags to Watch For
- Guaranteed success programs with high refund prices — read the exclusions carefully; most patients are excluded from qualifying for the refund
- No published CDC data — all US ART clinics are required to report
- Pressure to start treatment immediately without a full diagnostic workup
- Dismissal of male factor testing — insisting on treating the female partner without first evaluating sperm
- Unwillingness to discuss their data in detail
Does Location Matter?
Yes — but not as much as quality. Within a 2–3 hour radius, it's often worth traveling to a higher-quality center. The difference of a 10–15% better live birth rate can be more valuable than saving 2 hours of drive time per monitoring appointment.
If you're considering fertility treatment abroad, the quality gap between top international centers and US clinics is narrower than most people assume. Centers in Spain, Czech Republic, Mexico, Chile, and Brazil operate under rigorous self-regulation (ESHRE, ASRM equivalent) and often achieve comparable clinical outcomes at 30–60% lower cost.
For peer support and patient advocacy resources as you navigate clinic selection, RESOLVE — The National Infertility Association is the leading nonprofit resource for infertility patients in the United States.
Once you've identified your top candidates, consider reviewing our guide on IVF success rates by age to contextualize what the CDC data means for your specific age bracket. If egg freezing is part of your planning, the same lab quality metrics apply.
Related Resources
- How to Read IVF Success Rates
- Find IVF Clinics — Compare by CDC Success Rate
- Find IUI Clinics Near You
- IVF Success Rates by Age — CDC Data
- Fertility Clinics Near Me
This article was medically reviewed by Dr. Cristian Jesam, MD — Reproductive Medicine Specialist, Instituto Chileno de Medicina Reproductiva (ICMER), Santiago; Associate Professor, Reproductive Medicine Unit, Universidad de Chile. Last reviewed April 2025.
