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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?
The human body produces and destroys 15 million blood cells every second.
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.