Although it is inexpensive, easy to obtain and poses little health risk, women undergoing in vitro fertilization (IVF) cannot rely upon aspirin to help them become pregnant, according to a systematic review of nine studies.Over-the-counter aspirin, or acetylsalicylic acid (ASA), is typically used as a pain reliever. When taken daily, aspirin might lower the risk of heart attack, clot-related strokes, and other blood flow problems. Although it has its benefits, aspirin might also cause serious side effects, such as kidney failure, bleeding problems and some kinds of strokes.