This is common and very normal. It's medical term is Mittelschmerz. The ovulation spasm/pain is a good indication of ovulation. If you are concerned about it, you can talk to your doctor.
It is common and actually helpful if you are trying to get pregnant! I have the same ovulation pains every month, the day before I ovulate. It is awesome because it lets me know to try to conceive that day and the next. Some women have barely noticeable pain and others have really bad ovulation pain, but it is just a sign that your body is ovulating.