Understanding IUI Success Symptoms Day By Day can help you stay informed during the two-week wait after your IUI procedure. At BloomIVF, we guide patients through every stage — from mild cramping and spotting on day 1–3 to breast tenderness, mood changes, and fatigue by day 7–10. Around day 12–14, implantation symptoms and a missed period may indicate a positive outcome. Each body reacts differently, so noticing early signs can offer reassurance.