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Did you know?
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Thyroid conditions may make getting pregnant impossible.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
![Some red squirrels adopt the offspring of related individuals, a likely example of kin selection pro](https://biology-forums.com/gallery/47/medium_33_09_09_11_10_15_28_17161536.jpeg)
![William Masters and Virginia Johnson are among the most influential researchers in the history of th](https://biology-forums.com/gallery/47/medium_558257_07_07_16_12_34_14_236661532.jpeg)