March 18, 2011

20-Year-Long Sperm Cell Mystery Finally Solved

The Scientist, The Scientist

Carin Cain

Scientists have solved a 20-year mystery regarding the molecular mechanism by which human sperm detect an egg. The answer lies in a unique ion channel that senses progesterone, causing an influx of calcium into the sperm cells.

The finding, published in a pair of papers this week in Nature, provides a clue to some types of male infertility, and could someday be the foundation for a non-hormonal contraceptive.

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October 12, 2013
Fish Have Oral Sex, Too... Kind of
Scicurious, Neurotic Physiology
When it comes to parenting, some animals will go the extra mile. Possums, for example, have their young clinging on as they trundle around. Kangaroos give birth to immature young that they keep in a pouch until it's bursting... more ››