After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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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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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
A classification system for living and extinct organisms.
An open circulatory system.
digestive system
The conduction system of the heart.
Common Pathological Conditions of the Integumentary System
Neurotransmitters of the Autonomic Nervous System (2 of 2)