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The horizontal fraction bar was introduced by the Arabs.
There are approximately 3 million unintended pregnancies in the United States each year.
Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).