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Developed by Ivy Surrogacy — the first U.S. surrogacy agency to introduce an evidence-based embryo transfer success rate calculator grounded in multicenter clinical data.
Most online fertility calculators oversimplify success rates by considering only age or clinic averages. The Ivy Surrogacy Embryo Transfer Success Rate Calculator is the first of its kind to integrate three clinically verified variables—age, blastocyst day, and morphology—into a unified model specific to PGT-A euploid embryos.
Our goal is to make IVF outcomes more understandable, transparent, and science-based—helping families plan their next steps with confidence.
This calculator estimates your live birth probability for each PGT-A euploid embryo transfer, based on three key clinical factors:
Age of the egg provider (age-related implantation probability)
Blastocyst developmental day (D5, D6, D7)
Embryo morphology grade (AA–CC)
Each embryo transfer is assigned an individual probability (p₁, p₂, p₃ …) according to published multicenter studies.
The cumulative probability of achieving at least one live birth after multiple single-embryo transfers is calculated as:
CLBR = 1 − ∏_{i=1..n} (1 − p_i)
Where:
pᵢ = the estimated live birth probability of the i-th transfer
n = total number of single embryo transfers
This formula represents the probability of achieving at least one live birth across several independent transfers.
The model caps the per-transfer rate (≤ 62%) and CLBR (≤ 97%) to reflect biological variability and the inherent uncertainty of implantation and gestation outcomes, rather than assuming a perfect 100% success scenario.
This calculator estimates live birth probabilities for self-transfer (the intended mother’s own uterus) using PGT-A euploid, single-embryo transfers. It does not include outcomes for gestational carrier (surrogate) transfers.
In theory—and especially for women of advanced reproductive age—using a younger gestational carrier may achieve higher live birth rates, but large multicenter datasets isolating this effect for euploid single-embryo transfers remain limited.
Indicates the chance of achieving a live birth from one PGT-A euploid embryo transfer.
Represents your overall likelihood of having at least one live birth after several transfers using euploid embryos.
Example 1:
A 34-year-old transferring a Day-5 AA embryo → ≈ 62% per transfer.
Example 2:
A 41-year-old transferring a Day-6 BB embryo → ≈ 38% per transfer.
Remember, while each embryo transfer is independent, cumulative success rises with each additional euploid transfer.
Embryo transfer success depends on a combination of biological, embryologic, and uterine factors.
The Ivy Surrogacy model integrates findings from several large-scale U.S. multicenter studies to quantify their relative impact on live birth rates.
Even with chromosomally normal (PGT-A euploid) embryos, live birth rates gradually decline with age due to subtle changes in oocyte quality and uterine receptivity.
Reference: Lindner P et al., Fertility and Sterility, 2025 — Live birth outcomes after euploid transfer: autologous vs. donor oocyte embryos in patients aged ≥35 years.
Day 5: Highest implantation and live birth potential.
Day 6: Approximately 10–12% lower live birth rate compared with D5.
Day 7: Substantially reduced success (~30% lower than D5).
Reference: Brolinson M et al., Fertility and Sterility, 2023 — What is the reproductive potential of euploid Day-6 and Day-7 blastocysts compared to euploid Day-5 blastocysts?
Morphology grading remains predictive of implantation and live birth even among euploid embryos.
Higher-quality (AA, AB) blastocysts yield superior outcomes compared with lower grades (BB, BC, CC).
References:
Zhang WY et al., J Assist Reprod Genet, 2022 — The impact of euploid blastocyst morphology and maternal age on pregnancy and neonatal outcomes in natural cycle frozen embryo transfers.
Murugappan G et al., F&S Reports, 2020 — Prognostic value of blastocyst grade after frozen euploid embryo transfer in patients with recurrent pregnancy loss.
While this model estimates self-transfer outcomes, it does not include gestational carrier (surrogate) data.
Surrogates are typically younger and parous, which may result in higher live birth probabilities, though large-scale euploid-specific datasets remain limited.
By integrating these evidence-based factors, Ivy Surrogacy’s calculator provides a clinically grounded, transparent model that reflects real-world embryo transfer success rates and helps families understand realistic expectations for IVF outcomes.
Before estimating your live birth chance, it’s helpful to know how likely each embryo is to be chromosomally normal (euploid) in the first place.
Our PGT-A Probability Calculator predicts the likelihood that an embryo will pass PGT-A testing based on the egg provider’s age and blastocyst developmental day (D5/D6/D7).
These two tools work hand in hand to give a full picture of your IVF outcomes:
PGT-A Probability Calculator: Estimates how many embryos are likely to be chromosomally normal.
Embryo Transfer Success Rate Calculator: Estimates how likely those euploid embryos are to result in a live birth.
👉 Try it here: PGT-A Probability Calculator
Below are common questions about how the embryo transfer success rate is calculated and interpreted. These answers are based on published data for PGT-A euploid single-embryo transfers and focus on live birth rate—the most reliable indicator of IVF success.
Unlike generic IVF success tools, the Ivy Surrogacy calculator integrates age, blastocyst day (D5–D7), and morphology — all validated predictors of live birth outcomes for PGT-A euploid embryos.
This calculator estimates the live birth rate, not the pregnancy rate.
While a positive pregnancy test (β-hCG) marks implantation, only a live birth confirms successful completion of the IVF cycle.
Because some pregnancies end in early miscarriage or fetal demise, the live birth rate is always lower than the pregnancy rate.
It is based on multicenter clinical datasets from more than 15,000 euploid embryo transfers in the United States.
While highly evidence-based, individual outcomes can still vary due to uterine factors, embryo quality, and clinical conditions.
No. It models self-transfer results. However, gestational carriers—who are often younger and have proven fertility—may achieve higher live birth rates, particularly for older intended mothers.
It represents the chance of at least one live birth after several single-embryo transfers from the same cohort:
CLBR = 1 − ∏<sub>i = 1..n</sub>(1 − p<sub>i</sub>)
For PGT-A euploid single transfers, typical live birth rates range from 40–60%, depending on age, embryo day, and morphology.
No. The results provide an evidence-based estimate to guide expectations—not a guarantee.
Discover our free, medically informed calculators to plan your IVF and pregnancy journey.
Estimate euploid likelihood using age and blastocyst development data.
Age, blastocyst day (D5–D7), and morphology combined for live-birth odds.
Get EDD from LMP or embryo transfer day — IVF-friendly.
Personalized targets by pre-pregnancy BMI for singleton/twins.
Auto unit conversion with standard BMI categories.
Feet/inches ⇄ centimeters, pounds ⇄ kilograms — no math.
⚠️ Disclaimer: This calculator is for educational and informational purposes only. It is not intended to diagnose or treat any medical condition. For personalized medical advice, always consult your physician, OB-GYN, or midwife.
