How does fertilization take place? Science’s new view on the race from sperm to egg

  • Laura Plitt
  • BBC News World

sperm

Credit, Getty Images

The process of human fertilization has been taught to many of us as if it were a fable or a fairy tale.

A story in which millions of tadpoles with giant heads and thin tails swim frantically in a hostile environment with a single objective: to reach the egg that patiently waits for their arrival.

The fastest and most agile sperm to complete this marathon wins the prize. She conquers the egg, penetrates it, and thus an embryo begins to take shape.

With a few words more or a few less, this is the narrative that usually accompanies the fertilization process.

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