in your
cycle (early or late), you should track a few cycles then average out the days. This will give you a broad idea as to when you might be ovulating to time bding better. You can also use the ovulation kits each month to find out when you ovulate or if you really want to cover all your basis...bd on the 8th, 10th, 12th, 14th, 16th and 18th days of each cycle. That should cover any early or late ovulations. Good luck.