THOMAS FREDBERG / SCIENCE PHOTO LIBRARY THOMAS FREDBERG / SCIENCE PHOTO LIBRARY
Sperm bank. Laboratory worker packing frozen sperm for shipment. She is filling the container with dry ice (frozen carbon dioxide). This work is being carried out at Cryos International Sperm Bank, Aarhus, Denmark. The world's largest sperm bank, it has stocks of over 170 litres of sperm (around 130,000 samples) that are used for fertility treatments, creating more than 2000 babies each year. Photographed in 2012.
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