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Sperm Morphology (Shape) and Male Infertility

It’s Not Just About Count — Shape Matters Too

When couples struggle to conceive, much attention is given to sperm count. But in reality, how the sperm looks — its shape and structure — is just as important. Abnormal sperm morphology, medically known as teratozoospermia, is one of the leading causes of male infertility, even in men with a normal sperm count.

At Sparsh IVF, we help men understand and overcome morphology issues using advanced diagnostics, lifestyle optimization, and world-class IVF-ICSI protocols.

What Is Sperm Morphology?

Sperm morphology refers to the size and shape of the sperm cell, including:

  • Head (which contains genetic material)
  • Midpiece (which powers the tail)
  • Tail (which propels the sperm)

Healthy sperm must be properly shaped to penetrate the egg and achieve fertilization. Abnormally shaped sperm may have:

  • Misshapen or large heads
  • Double heads
  • Bent or coiled tails
  • Defects in the midpiece

Morphology is assessed using Kruger’s Strict Criteria during a semen analysis. Typically, ≥4% normal forms is considered acceptable — though many fertile men fall below this threshold.

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Causes of Abnormal Sperm Morphology

Morphology issues can be influenced by several internal and external factors:

  • Genetic abnormalities
  • Varicocele (enlarged veins in the scrotum)
  • Infections or inflammation in the reproductive tract
  • Exposure to toxins (pesticides, heavy metals)
  • Smoking, alcohol, or recreational drugs
  • High fever or illness within 2–3 months prior
  • Tight clothing or prolonged heat exposure (laptops, hot baths)
  • Oxidative stress from poor diet or lifestyle

Sometimes, the cause remains idiopathic (unknown), especially when other sperm parameters are normal.

How Morphology Affects Fertility

Abnormally shaped sperm often have:

  • Reduced ability to swim (poor motility)
  • Lower fertilization potential
  • Difficulty binding and penetrating the egg
  • Higher chance of carrying damaged DNA
  • Reduced embryo quality in IVF

In couples with unexplained infertility or multiple IUI failures, sperm morphology is often the hidden cause.

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Symptoms and Detection

Men with morphology issues typically have no symptoms. Most cases are discovered through a detailed semen analysis — often after a period of unsuccessful conception.

If you’re facing delayed pregnancy despite healthy lifestyle and timed intercourse, it’s time to investigate morphology.

Diagnosis at Sparsh IVF

We conduct a comprehensive semen analysis in our andrology lab using Kruger’s criteria. Our process includes:

  • Percentage of normal forms
  • Visual documentation using high-resolution microscopy
  • Sperm DNA fragmentation test (if morphology is severely affected)
  • Oxidative stress markers in select cases

We also evaluate associated parameters like motility, count, and volume to give a complete picture of fertility potential.

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Treatment Options for Poor Sperm Morphology

While improving morphology completely isn’t always possible, successful conception is still achievable — with the right care plan.

  • Antioxidants: Vitamin C, E, Zinc, CoQ10, L-Carnitine
  • Stress management, regular sleep, and hydration
  • Avoiding alcohol, tobacco, recreational drugs
  • Wearing loose-fitting clothing, avoiding heat exposure

These changes can significantly improve sperm health over 2–3 months.

  • Varicocelectomy if varicocele is diagnosed
  • Antibiotics for infection
  • Hormonal therapy for imbalances (rare)
  • May be effective in mild morphology issues with normal motility
  • Less successful when <4% normal forms or high DNA damage is present

For moderate to severe cases, ICSI is the gold standard.

  • A single morphologically normal sperm is selected and injected into the egg
  • Bypasses the natural barriers to fertilization
  • Significantly increases fertilization success, even with poor morphology
  • Often combined with Sperm DNA Fragmentation Index (DFI) testing

At Sparsh IVF, our embryologists are trained to identify and select the healthiest sperm — giving you the best possible outcome.

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IVF-ICSI Success in Morphology Cases

Many couples with severe teratozoospermia have achieved parenthood with:

  • Personalized stimulation cycles
  • High-quality sperm selection via IMSI or PICSI (if needed)
  • DNA fragmentation repair strategies
  • Embryo freezing for future cycles
  • Preimplantation Genetic Testing (PGT) in select cases

Why Choose Sparsh IVF?

  • Advanced semen analysis and morphology testing in-house
  • Expertise in managing teratozoospermia IVF protocols
  • Transparent, science-led counselling and expectations
  • Coordinated male-female fertility plans for better outcomes
  • Compassionate team committed to your dream of fatherhood
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Shape Doesn’t Define Potential — Action Does

A sperm’s shape might affect its ability to fertilize — but it doesn’t end your chances of having a child. With today’s reproductive science, we can work around morphology and move forward toward a healthy pregnancy.

Book your fertility consultation at Sparsh IVF today. Let’s reshape your journey — with clarity, science, and care.

Even if sperm can’t swim or look perfect, we can help them reach their destination.