Understanding Grade C (Non-Progression Motility): Normal vs Optimal Ranges

?What is Grade C (Non-Progression Motility)?

Grade C motility refers to sperm that move but do not progress forward in a linear fashion, or move only sluggishly without directional movement. This classification is part of the World Health Organization (WHO) semen analysis criteria used to assess male fertility potential. A high percentage of Grade C sperm may suggest reduced fertilizing capacity.

!Why It Matters

Sperm motility is a key determinant of male reproductive function, as sperm must move effectively to reach and fertilize an egg. A high proportion of non-progressive sperm can be associated with reduced fertility or increased difficulty conceiving naturally. Understanding motility patterns helps identify potential male factor infertility and guides treatment decisions.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Difficulty conceiving or infertility
• Reduced ejaculate volume
• Abnormal semen consistency
• History of recurrent pregnancy loss
• Sexual dysfunction or reduced libido

How to Improve Your Levels

• 1Optimize antioxidant intake through diet (vitamin E, selenium, zinc) to protect sperm from oxidative damage
• 2Maintain healthy body weight and regular physical exercise to support hormonal balance
• 3Avoid heat exposure to the testes (limit hot baths, tight clothing, prolonged sitting)
• 4Reduce stress through relaxation techniques, as cortisol may impact sperm quality
• 5Limit alcohol consumption and avoid smoking and recreational drugs
• 6Ensure adequate sleep and consider supplementation with L-carnitine or Coenzyme Q10 under medical guidance

When to Test

Semen analysis including motility assessment is recommended for couples with infertility (inability to conceive after 1 year of regular unprotected intercourse), during fertility workup, before assisted reproductive procedures, or when investigating male factor infertility.

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