Thyroid conditions may make getting pregnant impossible.
Did you know?
In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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The longest a person has survived after a heart transplant is 24 years.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Organ systems of the body with major functions.
Basic graphs of functions
How to find derivatives of reciprocal trigonometric functions
How to find the domain and range of natural logarithmic functions (Part 1)
Functions and Properties of Blood
Points of control over eukaryotic gene expression.