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Understanding the Body [Risc OS]
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1995-07-05
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295b
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6 lines
From Conception to Birth
Page 2
When the penis is moved in and out of the vagina the couple become very excited.
The man ejaculates, squirting semen inside the woman.
The sperm swim up the vagina and into the uterus. One sperm only need reach the egg and penetrate it to create a new life.