Which factors are involved in determining male fertility?

Which factors are involved in determining male fertility?

• A. Number of sperm, size, shape, and motility of sperm
• B. Blood type and hair color
• C. Height and weight
• D. Diet and exercise only

Answer: (A)

Fertility in males hinges on the ability of sperm to be produced in adequate numbers and to function properly. The key indicators are the concentration of sperm in semen (how many sperm are available to fertilize an egg), the morphology or size/shape of the sperm (normal structure is important for penetrating the egg), and the motility or movement of the sperm (the ability to swim toward and reach the egg). If any of these parameters are poor, fertilization becomes unlikely because there are fewer fertile sperm, the others may not be able to penetrate the egg, or they cannot reach it in time. Other factors listed don’t directly define fertilizing capability. Blood type and hair color don’t influence the fertilization mechanics. Height and weight aren’t direct determinants of fertility by themselves, though overall health can influence reproductive hormones. Diet and exercise can affect general health and semen quality, but the specific aspects that determine male fertility are the number, shape, and movement of sperm.

Fertility in males hinges on the ability of sperm to be produced in adequate numbers and to function properly. The key indicators are the concentration of sperm in semen (how many sperm are available to fertilize an egg), the morphology or size/shape of the sperm (normal structure is important for penetrating the egg), and the motility or movement of the sperm (the ability to swim toward and reach the egg). If any of these parameters are poor, fertilization becomes unlikely because there are fewer fertile sperm, the others may not be able to penetrate the egg, or they cannot reach it in time.

Other factors listed don’t directly define fertilizing capability. Blood type and hair color don’t influence the fertilization mechanics. Height and weight aren’t direct determinants of fertility by themselves, though overall health can influence reproductive hormones. Diet and exercise can affect general health and semen quality, but the specific aspects that determine male fertility are the number, shape, and movement of sperm.