Estimate your potential IVF success rate based on key factors.
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Average
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Excellent
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Average
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ICSI
Conventional IVF
Fresh Single Embryo Transfer
Fresh Multiple Embryo Transfer
Frozen Single Embryo Transfer
Frozen Multiple Embryo Transfer
Estimated IVF Success Rate:–%
Understanding IVF Success Rates
In Vitro Fertilization (IVF) is a complex process that involves fertilizing an egg with sperm outside the body. The success of IVF can vary significantly among individuals and couples, influenced by a multitude of biological and clinical factors. This calculator aims to provide an estimated probability of a successful IVF cycle, defined as achieving a clinical pregnancy (confirmed by ultrasound or hCG levels) per cycle started, based on commonly considered indicators.
Factors Influencing IVF Success
Woman's Age: This is arguably the most significant factor. Egg quality and quantity decline with age, directly impacting fertilization and implantation rates. Younger women generally have higher success rates.
Previous IVF Cycles: A history of successful IVF cycles can sometimes indicate a higher likelihood of success in subsequent attempts, though it's not always a guarantee. Conversely, multiple unsuccessful cycles might suggest underlying challenges.
Egg Quality: High-quality eggs are crucial for successful fertilization and the development of healthy embryos. Factors like age, genetic health, and lifestyle can affect egg quality.
Sperm Quality: Sperm count, motility (movement), and morphology (shape) are vital for fertilization. Poor sperm quality can significantly reduce success rates.
Fertilization Method:
ICSI (Intracytoplasmic Sperm Injection): A single sperm is injected directly into an egg. It's often used for male factor infertility or previous fertilization failures.
Conventional IVF: Sperm are mixed with eggs in a petri dish, allowing natural fertilization to occur.
Embryo Transfer Type: Whether the transfer is fresh or frozen, and if single or multiple embryos are transferred, impacts success rates and the risk of multiple pregnancies. Single Embryo Transfers (SET) are increasingly favored to reduce the risk of high-order multiples.
How the Calculator Works (Simplified Model)
This calculator uses a simplified, heuristic model to estimate success rates. It assigns weighted scores to each input parameter based on general clinical observations and statistical trends. The actual success rates can vary widely and are best discussed with a fertility specialist who can consider your unique medical history and provide personalized advice. The formula used here is illustrative and not a substitute for professional medical consultation.
Disclaimer: This calculator is for informational purposes only and does not constitute medical advice. It is essential to consult with a qualified healthcare provider for any health concerns or before making any decisions related to your health or treatment. Actual IVF success rates depend on numerous factors not fully captured by this simplified model.
function calculateIVFSuccess() {
var womanAge = parseFloat(document.getElementById("womanAge").value);
var numberOfPreviousIVF = parseInt(document.getElementById("numberOfPreviousIVF").value);
var eggQuality = document.getElementById("eggQuality").value;
var spermQuality = document.getElementById("spermQuality").value;
var fertilizationMethod = document.getElementById("fertilizationMethod").value;
var embryoTransferType = document.getElementById("embryoTransferType").value;
var baseRate = 40; // A hypothetical starting point, representing an average scenario
// Adjustments based on factors
var ageAdjustment = 0;
if (womanAge = 25 && womanAge = 30 && womanAge = 35 && womanAge = 38 && womanAge = 40) ageAdjustment = -30;
var previousIVFAdjustment = 0;
if (numberOfPreviousIVF === 1) previousIVFAdjustment = 5;
else if (numberOfPreviousIVF === 2) previousIVFAdjustment = 3;
else if (numberOfPreviousIVF >= 3) previousIVFAdjustment = -5; // Diminishing returns or potential issues
var eggQualityAdjustment = 0;
if (eggQuality === "excellent") eggQualityAdjustment = 10;
else if (eggQuality === "good") eggQualityAdjustment = 5;
else if (eggQuality === "average") eggQualityAdjustment = 0;
else if (eggQuality === "poor") eggQualityAdjustment = -15;
var spermQualityAdjustment = 0;
if (spermQuality === "excellent") spermQualityAdjustment = 7;
else if (spermQuality === "good") spermQualityAdjustment = 3;
else if (spermQuality === "average") spermQualityAdjustment = 0;
else if (spermQuality === "poor") spermQualityAdjustment = -10;
var fertilizationMethodAdjustment = 0;
if (fertilizationMethod === "icsi") fertilizationMethodAdjustment = -2; // ICSI may have slightly lower fertilization rates on average, but used for specific reasons
else fertilizationMethodAdjustment = 2; // Conventional
var embryoTransferAdjustment = 0;
if (embryoTransferType === "fresh_single_embryo") embryoTransferAdjustment = 5;
else if (embryoTransferType === "fresh_multiple_embryo") embryoTransferAdjustment = 7; // Can increase chance of pregnancy, but higher risk of multiples
else if (embryoTransferType === "frozen_single_embryo") embryoTransferAdjustment = 4;
else if (embryoTransferType === "frozen_multiple_embryo") embryoTransferAdjustment = 6;
// Ensure inputs are valid numbers before calculating
if (isNaN(womanAge) || isNaN(numberOfPreviousIVF) ||
womanAge 55 || numberOfPreviousIVF < 0) {
document.getElementById("result-percentage").innerText = "Invalid Input";
return;
}
// Calculate final estimated rate
var estimatedRate = baseRate + ageAdjustment + previousIVFAdjustment + eggQualityAdjustment + spermQualityAdjustment + fertilizationMethodAdjustment + embryoTransferAdjustment;
// Clamp the result between 0 and 100
estimatedRate = Math.max(0, Math.min(100, estimatedRate));
document.getElementById("result-percentage").innerText = Math.round(estimatedRate) + "%";
}
function resetCalculator() {
document.getElementById("womanAge").value = "";
document.getElementById("numberOfPreviousIVF").value = "";
document.getElementById("eggQuality").selectedIndex = 0;
document.getElementById("spermQuality").selectedIndex = 0;
document.getElementById("fertilizationMethod").selectedIndex = 0;
document.getElementById("embryoTransferType").selectedIndex = 0;
document.getElementById("result-percentage").innerText = "–%";
}