I don't want to shorten my cycles (I'm fairly regular at 29 days), just lengthen the luteal phase or get rid of the spotting so I get a full 14 days between ov & af as I've read that early spotting before af can mean that any fertilised egg may not have a chance to embed as the lining has already started to shed (or more scientific put than that!!) although I know many people have conceived successfully despite spotting. Anything to actually feel like you're helping right?!