Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Did you know?
Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
Did you know?
It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
Did you know?
Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
The Phases of the Menstrual Cycle: Follicular Phase and Luteal Phase
The cell cycle.
Prenatal Diagnostic Tests
Plant life cycle
The three-step cycle of PCR
The normal cell cycle and each of its growth phases