Happy 18th! The WHI study on HRT has come of age. But should we be celebrating? Some doctors argue the effects of this study have cost a generation of women their long term health.   You may remember waking up 18 years ago to headlines emblazoned across newspapers proclaiming hormone replacement therapy (HRT) increased the risk of developing breast cancer. If you were about to take your morning dose, you could easily be forgiven for spitting it out and then flushing it and the rest of the packet down the loo. And you wouldn’t have been alone. The story was…