Timing plays a crucial role in the success of fertility treatments, especially Intrauterine Insemination (IUI). Even with healthy sperm and eggs, the chances of conception significantly depend on performing the procedure at the most fertile window of a woman’s cycle. Understanding when IUI works best can help couples approach treatment with confidence and realistic expectations. What is IUI and Why Does Timing Matter? IUI is a fertility procedure in which processed sperm is carefully placed into the uterus during ovulation. Since the egg survives for only about 12–24 hours after release, and sperm can live up to 3–5 days , identifying this fertile period is essential. Proper timing ensures that sperm is already present in the fallopian tube when the egg is released, increasing the likelihood of fertilization. When Are IUI Success Chances Highest? ✅ Around Ovulation The ideal time for IUI is usually 24–36 hours after the trigger injection (commonly hCG), which stimulates ...