The date of IUI depends on the day of ovulation. If there is no infertility, and you both are comfortable, you can try self-vaginal insemination at home by calculating the ovulation day using
LH Kit. Many patients get
pregnant by this method. If that fails you should try IUI.
If you want to do IUI, it's better to do IUI after doing ovarian stimulation and using TVS follicular study to find the most suitable day of IUI. In most cases, IUI is done between day14 and day17 of the period.