Sperm Trivia: Cruel Competition

On average, 200 million sperm will be produced per ejaculation, which is really fierce competition The sperm who…

On average, 200 million sperm will be produced per ejaculation, which is really fierce competition

Sperm Trivia: Cruel Competition
Sperm Trivia: Cruel Competition

The sperm who finally rushed to the ovaries to conceive, would you like to give a speech

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