How Progesterone Stimulates Sperm - Naked Scientists NewsFLASH - 21.03.11 - a podcast by Dr Chris Smith

In this NewsFlash, we discover the role quartz plays in making mountain ranges, celebrate MESSENGER going successfully into orbit around Mercury, and explore the reasons why birds fly into obvious objects. Plus, how progesterone excites sperm - we explore the role of a sperm-specific protein that could lead the way to a new contraceptive!

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