In Vitro Fertilization (IVF) is a complex assisted reproductive technology that has helped millions of individuals and couples conceive. The success rate of an IVF cycle is not a single, fixed number but rather a probability influenced by a multitude of factors. This calculator provides an estimated probability of success based on several key indicators.
Key Factors Explained:
Maternal Age: This is perhaps the most significant factor influencing IVF success. Egg quality and quantity naturally decline with age, making it harder to achieve a viable pregnancy. Success rates are generally highest for women under 35 and decrease steadily thereafter.
Previous IVF Cycles Completed: Prior experience with IVF can offer insights. A history of successful pregnancies, even from previous cycles, may indicate a higher likelihood of success. Conversely, multiple unsuccessful cycles might suggest underlying challenges.
Embryo Quality Score: After fertilization, embryos are graded based on their development and appearance. Higher quality embryos (often scored on a scale, with higher scores indicating better quality) have a greater chance of implanting and leading to a successful pregnancy.
Primary Fertility Diagnosis: The underlying cause of infertility plays a crucial role. Conditions like blocked fallopian tubes or ovulation disorders may have different success rates with IVF compared to male factor infertility or unexplained infertility. The score here is a simplified representation; specific diagnoses have varied outcomes.
FSH Hormone Level: Follicle-Stimulating Hormone (FSH) is a key hormone that regulates ovarian function. High FSH levels, particularly when measured early in the menstrual cycle, can indicate diminished ovarian reserve, suggesting fewer and potentially lower-quality eggs available for fertilization, which can impact success rates.
Disclaimer: This calculator provides an estimation and should not be considered definitive medical advice. Actual IVF success rates can vary significantly and depend on many other factors not included in this simplified model, as well as the specific protocols used by your fertility clinic. Always consult with your fertility specialist for personalized guidance and information.
function calculateIVFSuccessRate() {
var age = parseFloat(document.getElementById("age").value);
var cyclesCompleted = parseFloat(document.getElementById("cyclesCompleted").value);
var embryoQuality = parseFloat(document.getElementById("embryoQuality").value);
var fertilityDiagnosis = parseFloat(document.getElementById("fertilityDiagnosis").value);
var hormoneLevels = parseFloat(document.getElementById("hormoneLevels").value);
var resultElement = document.getElementById("result");
resultElement.innerHTML = ""; // Clear previous results
// Input validation
if (isNaN(age) || isNaN(cyclesCompleted) || isNaN(embryoQuality) || isNaN(fertilityDiagnosis) || isNaN(hormoneLevels) ||
age 60 || cyclesCompleted < 0 || embryoQuality 5 || fertilityDiagnosis 5 || hormoneLevels <= 0) {
resultElement.innerHTML = "Please enter valid numbers for all fields.";
return;
}
// — Simplified IVF Success Rate Estimation Logic —
// This is a highly simplified model for illustrative purposes.
// Real-world IVF success is much more complex and uses proprietary algorithms.
var successRate = 0;
// Base rate influenced by age
if (age < 30) {
successRate = 50;
} else if (age < 35) {
successRate = 40;
} else if (age < 40) {
successRate = 25;
} else if (age < 43) {
successRate = 15;
} else {
successRate = 5;
}
// Adjust based on previous cycles (positive impact for few prior, slight negative for many without success)
if (cyclesCompleted 3) {
successRate -= 5; // Assuming multiple prior cycles without success might indicate challenges
}
// Adjust based on embryo quality (higher score = better)
successRate += (embryoQuality – 3) * 5; // e.g., score 5 adds 10%, score 1 subtracts 10%
// Adjust based on fertility diagnosis (lower score = potentially easier to treat)
// Assuming scores 1 and 2 are for more treatable conditions, 4 and 5 for more complex.
if (fertilityDiagnosis = 4) {
successRate -= 5;
}
// Adjust based on hormone levels (lower FSH generally better)
if (hormoneLevels 15) {
successRate -= 5;
} else if (hormoneLevels > 10) {
successRate -= 2;
}
// Cap and floor the success rate
if (successRate > 85) successRate = 85;
if (successRate < 5) successRate = 5;
// Display the result
resultElement.innerHTML = "Estimated IVF Success Rate: " + successRate.toFixed(1) + "%";
}