In vitro fertilization · ViaFERT
IVF results
at ViaFERT.
Explore ViaFERT’s in vitro fertilization (IVF) results: positive pregnancy tests per transfer, fertilization, and blastocyst development. Learn what each indicator measures and how to interpret the reference values.
Behind every question, there may be hope and uncertainty. We’re here to help you understand each figure, at your own pace.
Understanding your treatment journey
Positive pregnancy
tests after IVF
Positive pregnancy test per embryo transfer
71%
Figure provided by ViaFERTTransfers followed by a positive pregnancy test, divided by the number of transfers performed.
A reference for each process
IVF and ICSI
laboratory indicators
The ViaFERT column presents laboratory figures provided by the clinic on this page. The competency and benchmark columns follow the Vienna Consensus. These indicators are not pregnancy or live birth rates.
| Indicator | CompetencyMinimum reference | BenchmarkAspirational target | ViaFERTClinic result |
|---|---|---|---|
| Normal fertilization with IVF | ≥60% | ≥75% | 83% |
| Normal fertilization with ICSI | ≥65% | ≥80% | 94% |
| Day-5 blastocysts | ≥40% | ≥60% | 70% |
| Good-quality day-5 blastocysts | ≥30% | ≥40% | 65% |
ViaFERT report details to be added: reporting period, cutoff date, sample size, numerators, denominators, and population analyzed.
How are the laboratory indicators calculated?
- IVF: oocytes with 2PN/2PB ÷ inseminated cumulus–oocyte complexes × 100.
- ICSI: oocytes with 2PN/2PB ÷ injected mature MII oocytes × 100.
- Blastocysts: day-5 blastocysts ÷ normally fertilized day-1 oocytes × 100.
- Good quality: good-quality day-5 blastocysts ÷ normally fertilized day-1 oocytes × 100.
2PN/2PB: two pronuclei and two polar bodies. Reference population: women under 40, fresh own eggs, fresh or frozen ejaculated sperm, without PGT. Comparisons require following the definitions and exclusions of each indicator.
Your next step, at your own pace
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Understanding your options can bring hope and questions. We’re here to listen, learn about your story, and help you make decisions with clarity and care.
Before comparing a percentage
How to compare
IVF results
A rate per transfer and a cumulative rate per egg retrieval answer different questions. Before comparing results, check how they were calculated.
You don’t need to understand every term on your first day. Your questions deserve time and clear explanations.
- 1
Which outcome is measured?
A positive test, a clinical pregnancy, and a live birth should each be identified separately.
- 2
Which patients are included?
Consider age at egg retrieval, use of own or donor eggs, and treatment characteristics.
- 3
How many cases and which reporting period?
Review the numerator, denominator, dates, and available follow-up. Pending cases should be identified.
Clear answers to your questions
Frequently asked questions about IVF success rates
These answers can help you prepare for your consultation. You’re welcome to ask again whenever you need, at your own pace.
What does the 71% positive pregnancy test rate per transfer mean?
The 71% figure refers to embryo transfers followed by a positive pregnancy test, according to the figure provided by ViaFERT for this page. It is calculated by dividing transfers with a positive result by all transfers performed, then multiplying by 100. It describes this specific treatment outcome.
Data source: ViaFERT
What is the difference between conventional IVF and ICSI fertilization?
In conventional IVF, eggs and sperm are placed together in the laboratory. In ICSI, an embryologist injects one sperm into an egg. Both techniques are part of in vitro fertilization. The choice depends on a medical assessment and the patient’s treatment history.
Does a 94% ICSI fertilization rate mean ICSI is always the right choice?
No. The 94% figure is the ICSI fertilization rate provided by ViaFERT, not a recommendation for every patient. Choosing conventional IVF or ICSI requires reviewing sperm characteristics, previous fertilization outcomes, and the medical assessment. One percentage alone does not determine the appropriate treatment.
What does the day-5 blastocyst rate measure?
In the Vienna Consensus, the day-5 blastocyst rate is the proportion of normally fertilized eggs that reach the blastocyst stage on the fifth day. ViaFERT provides a figure of 70% for this indicator. The definition describes one stage of embryo development assessed in the laboratory.
What does the good-quality blastocyst rate mean?
In the Vienna Consensus, this indicator compares good-quality day-5 blastocysts with normally fertilized eggs. Assessment considers expansion, the inner cell mass, and the outer cell layer. ViaFERT provides a figure of 65% for this indicator. The reference denominator is not the total number of blastocysts.
What factors affect my chances with IVF?
Age, diagnosis, reproductive history, and treatment characteristics affect the prognosis. A clinic average describes a group of cases. A medical consultation helps interpret these figures in the context of your own situation and explore your options, with time to discuss your questions.
How can I compare IVF success rates between clinics?
Compare the same outcome using the same unit: per transfer, per egg retrieval, or cumulative. Review age, use of the patient’s own or donor eggs, number of cases, and reporting period. Differences in patients and treatments can affect percentages, so comparisons need that context.
What do competency levels and benchmarks mean in an IVF laboratory?
In the Vienna Consensus, a competency level is a minimum performance reference for a laboratory indicator. A benchmark is an aspirational target. Both apply to specific definitions and populations; they do not certify a clinic or guarantee pregnancy.
Let’s talk about your story.
Your story deserves to be heard. In a consultation, we can explore your options and answer your questions with care, at your pace and without pressure.
Sources and methodology
- ESHRE / Alpha. Vienna Consensus (2017). Laboratory indicators.
- ESHRE. Maribor Consensus (2021). Clinical indicators.
- CDC. ART Success Rates. Factors affecting the prognosis.
- CDC. Interpreting results. Calculation units and comparisons.
- HFEA. ICSI. Technique and treatment choice.
- HFEA. Choosing a clinic. Interpreting results from different patient populations.
The laboratory figures and the 71% positive pregnancy test rate per transfer were provided by ViaFERT on this page. The internal report, reporting period, sample size, and medical review are to be added. External sources support the methodological references; they do not validate the clinic’s own results.
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ViaFERT institutional information
Professional credentials and healthcare licenses
Dr. Miguel de Jesús López Rioja
Professional licenses: 6221712 · 8631483 · 10970871 · 11134623 · State Health Registry 25011
Mexican professional license numbers: 6221712 · 8631483 · 10970871 · 11134623
State Health Registry: 25011
Medical board certification numbers: 7850 · 257
Dra. Yesenia Recio López
Professional licenses: 6833051 · 9177521 · 10962446 · 11134617 · State Health Registry 25010
Mexican professional license numbers: 6833051 · 9177521 · 10962446 · 11134617
State Health Registry: 25010
Medical board certification numbers: 7925 · 259
Culiacán healthcare facility licenses
24-TR-25-006-0003 · Handling of germ cells for assisted reproduction
24-TR-25-006-0004 · Germ cell bank for assisted reproduction
24-AM-25-006-0002 · Surgical or obstetric procedures
Mazatlán healthcare facility licenses
25-TR-25-012-0001 · Handling of germ cells for assisted reproduction
25-TR-25-012-0002 · Germ cell bank for assisted reproduction
24-AM-25-012-0004 · Outpatient surgery (assisted reproduction)
The scope of each authorization should be checked against the current health authority resolution and the corresponding facility address. Advertising permit: COF001574.
ADVERTISING PERMIT COF001574
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