Whether you’re pregnant or you get the jitters, half-caf is basically pointless. It’s the equivalent of saying, ‘I’m going to work out really hard all week, but on the weekend, my diet has no rules!” It’s bogus, and it’s a way of coping with the fact that you’re still ingesting caffeine. Since decaf coffee still has caffeine, half-caf can’t ever be achieved. Your half-caf cup of coffee will still have 50-60% caffeine (because nobody really measures by the ounce, there’s no way to achieve a perfect half cup). It’s better to either go big, or go home when it comes to switching to decaf.