You want to know which alcohol increases fertility? There are a slew of Chinese medicinal alcohols that taste great.  Now, you are only supposed to drink a shot glass worth of it per day but I have drank half a bottle in a sitting.  While alcohol is not good for your liver and the strength and health of the liver is a major factor in your fertility, the herbs that are steeped in the alcohol will be rather beneficial for the health of your reproductive system.  I guess my point is, if you are going to drink booze you might as well drink liquor that has some health benefits as well.