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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.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.