IUI Success Rate Calculator

The IUI Success Rate Calculator estimates the per-cycle probability of pregnancy based on age, screening assessment, and treatment history. This tool helps patients and fertility professionals understand realistic expectations for Intrauterine Insemination outcomes. Whether you are planning your first cycle or evaluating previous attempts, this tool provides data-driven insights tailored to your specific medical profile.

Age of the person undergoing IUI treatment (18-50).
Total completed IUI cycles prior to this attempt.
Type of ovulation induction used.
Primary infertility screening assessment.
Based on post-wash total motile count.

Intrauterine Insemination (IUI) is a fertility treatment where sperm is placed directly into the uterus. Success depends heavily on the specific medical factors of the patient and the sperm quality.

How Per-Cycle Pregnancy Rate Is Calculated

This calculator uses a multivariate probability model derived from ASRM and ESHRE outcome ranges. It starts with a base age-related success rate and adjusts it based on specific treatment and screening assessment factors.

P = B × T × D × S

Where:

  • P = Adjusted per-cycle probability
  • B = Base age-related rate (e.g., 12% for <35)
  • T = Treatment factor (e.g., 1.3 for injectables)
  • D = Screening assessment factor (e.g., 0.9 for mild male factor)
  • S = Sperm factor (e.g., 0.8 for borderline quality)

The result is then capped at a maximum of 30% per cycle to reflect realistic biological limits. The cumulative probability adds the current cycle to your history using the formula: C = 1 - (1 - P)^n.

What Your Calculation Mean

Your Calculation indicate the likelihood of a clinical pregnancy per single attempt, as well as the odds over several attempts. Use these figures to set realistic goals with your fertility specialist.

Clinical Interpretation Guide

Good Success (>12% per cycle): Typical for patients under 35 with unexplained infertility or ovulatory disorders using medication. Expectation is positive.

Moderate Success (5-12% per cycle): Common for patients aged 35-40 or those with mild male factor factors. Multiple cycles are often recommended.

Low Success (<5% per cycle): Often seen in patients over 42 or with significant sperm/tubal factors. Patients in this category may consider discussing IVF with their doctor.

Calculation logic verified using publicly available standards.

View our Accuracy & Reliability Framework →