Here's a neat article that lists seven myths about getting pregnant. See how many you have heard, and if any of them are keeping you from getting pregnant. Listed here is the first one. Go to the article if you want to read the rest...
Myth Number One: You should have sex on day 14 of your cycle if you want to get pregnant. You have probably heard that most women ovulate on day 14 of their cycle. This is simply not true. It is based on the calendar method of predicting ovulation. If you have a perfect 28 day cycle, where your luteal phase (the second half of your cycle) is exactly 14 days long, you would likely ovulate around day 14. Most women, however, do not have perfect cycles and even the women who do have regular cycles, usually do not ovulate at exactly the same time each month.
Seven Fertility Myths That Could be Keeping you From Getting Pregnant