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Did you know?
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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There are more bacteria in your mouth than there are people in the world.
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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.