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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Vaccines prevent between 2.5 and 4 million deaths every year.
An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

