This fertility calculator provides an evidence-informed estimate of the probability of natural conception based on both male and female reproductive factors. It incorporates key sperm parameters such as volume, concentration, progressive motility, and morphology, along with female age. Monthly probabilities are adjusted according to age and sperm quality, with a peak monthly conception rate up to 25% and a lower bound of 1%. The cumulative probability over 5 years is capped at 95%, while even couples with the most unfavorable parameters retain a baseline cumulative fertility rate of approximately 50%.
Note: Morphology measurements can vary significantly between laboratories and therefore have a minimal impact on overall probability. This calculator is based on published studies and has not been empirically validated in clinical practice.
Disclaimer: This tool is intended for informational purposes only and is not a medical device. It is not an ovulation or fertility treatment predictor. Always consult a healthcare professional for personalized advice.
Estimate conception probability based on semen parameters and female age
