What is the normal sperm count range for male fertility?

• A. 5 million to 50 million per milliliter.
• B. 15 million to 200 million per milliliter.
• C. 50 million to 400 million per milliliter.
• D. 100 million to 1 billion per milliliter.

Answer: (B)

Normal sperm concentration measures how many sperm are present in each milliliter of semen. According to WHO criteria, a concentration of 15 million sperm per milliliter or more is considered normal. In practice, this is often summarized as about 15 to 200 million per milliliter, which covers the lower threshold and the range typically seen in fertile men. This matters because fertility isn’t determined by a single number; the concentration needs to meet or exceed the 15 million/mL mark, while extremely high values aren’t necessary to indicate fertility. So the span of 15 to 200 million per milliliter best reflects the commonly cited normal range. The other options miss the lower limit or propose unrealistically high values.