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Exactly about Exactly Exactly How Ultrasound Changed the Human Sex Ratio

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Exactly about Exactly Exactly How Ultrasound Changed the Human Sex Ratio

Editor’s Note: The following is an excerpt from Mara Hvistendahl’s book, Unnatural Selection: selecting Boys over Girls and also the effects of a global saturated in guys.

The technology that eventually became the dominant approach to intercourse selection throughout the world started as something for navigation. The storyline of ultrasound times to 1794, whenever a biologist that is italian how bats find their means within the dark discovered sonar, or even the proven fact that distance could be based on bouncing noise waves off a faraway item and calculating exactly exactly how long it takes for the waves to ricochet straight straight straight back. Read More