How successful is IUI?
Natural IUIs, meaning that no fertility drugs were used, tend to have lower success rates, dipping down to about 6% in some cases. However, IUIs done with fertility drugs that produce multiple eggs have success rates of up to 30% associated with them. Additionally, sperm count greatly affects the outcome with IUI. Using sperm samples with a smaller count often cause a couple to have less success. Overall, though, a success rate of 15% to 20% is associated with IUI.