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Beating the Odds
Ever wonder how much luck is involved in getting pregnant? The sperm and egg have to be joined in a relationship with millions-to-one odds. But once the winning sperm triumphs, the miracle of life begins.
Around 350,000 babies are born every day.
The male testicles hang freely in order to maintain a temperature that is three degrees cooler than the rest of the body, and they produce 1,000 sperm with every heartbeat.
X and Y sperm are produced in almost equal numbers; girls (X) are thought to be faster, but boys (Y) live longer, so the race is wide open.
The first sperm cell was officially ‘discovered’ in 1677 by a Dutchman named Antoine van Leeuwenhoek.
Only one percent of sperm that make it into the cervix have any chance of making it out alive.
Nineteenth-century evolutionary psychologists believed that the purpose of the female orgasm was to keep a woman lying down longer after sex, keeping sperm in the body and increasing her probability of conception.
More recently, it has been suggested the female orgasm evolved to create a stronger bond between lovers, increasing the chances of the couple staying together after a child is born. |
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ENGLISH: Dolby Digital Stereo