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Did you know?
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.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
The horizontal fraction bar was introduced by the Arabs.