rai, I was taking 600mg for about 6 months and have since cut back to 300mg to save some money. I have gotten a BFP when taking only 150mg, so I figure every bit helps. If you want to take an extra one, go for it... I was taking the blackmores one (4x 150mg) when I was taking 600mg. Now I take one blackmores and one of the one my acu sells (which also has vitamin E and alpha lipoic acid in it), each of which is 150mg (hence 300mg total). I've been toying with the idea of taking it up to 450mg (2 of the blackmores plus one from my acu) but don't think I'll go back to 600mg unless we decide to go ahead with an IVF (and then I'd do it for 4 months before to prepare). Did that make sense or are you now as confused as me?

babycakes, good to hear your DH had good results!