Chances of getting pregnant

I am now convinced that the chances of getting pregnant when you really want to are not that high. It's as if your bodies know that you are trying so they decide to mess with you for a while. All too often you hear about people who get pregnant when they don't want to be pregnant. What the hell is up with that? It just so happens that my scientific observations are that the chances of conceiving a child are at least 70-95% higher if you are drunk, 15 years old, or having a one-night stand. Life has it's mysteries and that just happens to be one of them.