Question 1
Question 2
Ask unlimited questions for free
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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.
Vaccines prevent between 2.5 and 4 million deaths every year.
Asthma cases in Americans are about 75% higher today than they were in 1980.
For a complete list of videos, visit our video library