Episode

5 live Science Podcast

BBC Radio 5 live

Science & Medicine, Natural Sciences

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Natural Sciences 95

5 live's science podcast, featuring Dr Karl, plus Dr Chris and Naked Scientists Chris Smith and Kat Arney with the hottest science news stories and analysis.

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DrKarl: A turn for sperm, 21 Mar 11

March 21st, 2011

Episode 32 of 680 episodes

Dr Karl discusses a breakthrough in how sperm get turned on: scientists have discovered how the female hormone progesterone activates sperm so they can fertilise an egg. The findings could also lead to new treatments for infertility and help to develop the next generation of contraceptives.

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