hopefully it will also work to lengthen the luteal phase, however I also don't think 2 months is enough time. Perhaps the doctor is erring on the side of caution - I can't say, I suppose the doc has his/her reasons but I know for sure it took 5 months for it to really have a lasting effect on me, the first month it worked and cycle went from 42 days to 32 but then the next month i think was 21, then back up to 36, etc, etc, so it took another couple of months for it to become 32 again. Everyone is different but I guess we have to just try and see how it affects us, individually. It is a herb after all and not tested-in-the-lab medicine. XX