The most common side effects of IUI include abdominal cramping, bloating, breast tenderness, nausea, fatigue, and spotting. Additionally, some women may experience an allergic reaction to the sperm used in the procedure, which may cause itching, swelling, or hives. If any of these symptoms occur, it is important to contact a medical professional immediately. Laurel Fertility Care has the best IUI treatment in San Francisco. Visit them at laurelfertility.com to know more.