Use this calculator to get an estimated success rate for an IVF cycle based on several key factors. Please note that this is a general estimate and individual results can vary significantly.
Day 5 Blastocyst
Day 3 Cleavage
No
Yes
Understanding IVF Success Rates
In Vitro Fertilization (IVF) is a complex and highly effective assisted reproductive technology. The success of an IVF cycle is influenced by a multitude of factors, making it challenging to predict with absolute certainty. However, understanding the key variables can help individuals and couples set realistic expectations.
Key Factors Influencing IVF Success:
Female Age: This is arguably the most significant factor. As a woman ages, both the quantity and quality of her eggs decline, leading to lower fertilization rates, higher rates of chromosomal abnormalities in embryos, and reduced implantation potential. Success rates are generally highest for women under 35 and decrease progressively with age.
Embryo Stage Transferred: Embryos can be transferred at different stages of development. Day 3 (cleavage stage) embryos are typically 6-8 cells, while Day 5 (blastocyst stage) embryos have developed into a more complex structure with distinct cell types. Blastocyst transfers often have higher success rates per embryo transferred because they have demonstrated greater viability and developmental potential in the lab.
Number of Embryos Transferred: Transferring more than one embryo can increase the chance of pregnancy, but it also significantly raises the risk of multiple pregnancies (twins, triplets), which carry higher health risks for both the mother and babies. Modern practice often favors single embryo transfer (SET) to minimize these risks while maintaining good success rates, especially with high-quality blastocysts.
Previous Live Birth from IVF/ART: A history of a successful live birth from a previous IVF or other assisted reproductive technology (ART) cycle can be a positive indicator for future cycles, suggesting a favorable reproductive environment and response to treatment.
Number of Previous Failed IVF Cycles: While a single failed cycle doesn't necessarily predict future outcomes, a history of multiple failed cycles can sometimes indicate underlying issues that may require further investigation or different treatment approaches. However, many couples achieve success after several attempts.
Cause of Infertility: The underlying cause of infertility (e.g., male factor, tubal factor, ovulatory dysfunction, unexplained infertility) can also play a role. Some causes may have higher or lower success rates with IVF.
Ovarian Reserve: This refers to the quantity and quality of a woman's remaining eggs. Markers like Anti-Müllerian Hormone (AMH) levels and Antral Follicle Count (AFC) are used to assess ovarian reserve, which correlates with response to ovarian stimulation and IVF success.
Lifestyle Factors: Smoking, excessive alcohol consumption, obesity, and high stress levels can negatively impact IVF success rates for both partners.
Clinic Success Rates: The experience and success rates of the fertility clinic and its laboratory are crucial. Clinics with higher success rates often have advanced technology, experienced embryologists, and robust quality control measures.
How to Use This Calculator:
Enter your specific details into the fields provided: your age, the stage and number of embryos planned for transfer, whether you've had a previous live birth from IVF, and the number of prior failed IVF cycles. Click "Calculate" to receive an estimated success rate.
Important Disclaimer:
This IVF Success Rate Estimator provides a generalized approximation based on common statistical trends. It is NOT a guarantee of success or failure. Actual outcomes are highly individual and depend on many factors not included in this simplified model, such as specific infertility diagnoses, ovarian reserve, sperm quality, uterine health, and individual clinic protocols. Always consult with a qualified fertility specialist for personalized advice, diagnosis, and treatment plans.
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function calculateIVFSuccess() {
var femaleAge = parseFloat(document.getElementById("femaleAge").value);
var embryoStage = document.getElementById("embryoStage").value;
var numEmbryos = parseInt(document.getElementById("numEmbryos").value);
var previousLiveBirth = document.getElementById("previousLiveBirth").value;
var failedCycles = parseInt(document.getElementById("failedCycles").value);
// Input validation
if (isNaN(femaleAge) || femaleAge 50) {
document.getElementById("result").innerHTML = "Please enter a valid female age between 20 and 50.";
return;
}
if (isNaN(numEmbryos) || numEmbryos 3) {
document.getElementById("result").innerHTML = "Please enter a valid number of embryos (1 to 3).";
return;
}
if (isNaN(failedCycles) || failedCycles 10) {
document.getElementById("result").innerHTML = "Please enter a valid number of previous failed cycles (0 to 10).";
return;
}
var baseSuccessRate = 30; // Starting point for a 'typical' scenario (e.g., 35-year-old, 1 blastocyst)
// Age adjustment
if (femaleAge = 30 && femaleAge = 35 && femaleAge = 38 && femaleAge = 41 && femaleAge 42
baseSuccessRate -= 20;
}
// Embryo Stage adjustment
if (embryoStage === "blastocyst") {
baseSuccessRate += 5; // Blastocysts generally have higher success rates
} else { // cleavage
baseSuccessRate -= 3; // Cleavage stage might be slightly lower
}
// Number of Embryos Transferred adjustment
if (numEmbryos === 2) {
baseSuccessRate += 5; // Slightly higher chance with two, but also higher risk of multiples
} else if (numEmbryos === 3) {
baseSuccessRate += 7; // Even higher chance, but significantly higher risk of multiples
}
// For 1 embryo, no change from base
// Previous Live Birth adjustment
if (previousLiveBirth === "yes") {
baseSuccessRate += 7; // Positive indicator
}
// Previous Failed IVF Cycles adjustment
if (failedCycles === 1) {
baseSuccessRate -= 3;
} else if (failedCycles === 2) {
baseSuccessRate -= 6;
} else if (failedCycles >= 3) {
baseSuccessRate -= 9;
}
// Ensure the rate stays within a reasonable range (e.g., 5% to 60%)
var estimatedRate = Math.max(5, Math.min(60, baseSuccessRate));
document.getElementById("result").innerHTML = "Your estimated IVF success rate per cycle is: " + estimatedRate.toFixed(1) + "%" +
"This is an estimate. Consult a fertility specialist for personalized advice.";
}