Semen

Sperm magnified in semen in the race to fertilise the egg

Semen is the ejaculate from the penis during sex and is a mixture of seminal fluid (95%) and sperm (5%). The incredible number of 20 to 40 million sperm are present in each ejaculation of semen. The quality of those sperm is essential for fertilisation to occur, and only the single fittest and luckiest sperm will actually get to fertilise an egg. It is the ultimate lottery.

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