Breast cancer hope as hormone shown to slow tumour growth

If effective in humans, adding the hormone progesterone to standard drug treatment could potentially benefit 25,000 women a year in the UK alone

Hundreds of thousands of women with breast cancer could potentially benefit from having a low-cost female hormone added to their therapy, scientists say.

The fresh hope emerged from research in animals which found that the hormone, progesterone, slowed the growth of breast cancers when it was combined with tamoxifen, the standard drug treament.

Related: Breast cancer could be 'stopped in its tracks' by new technique, say scientists

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