Male Fertility: Semen Analysis & Sperm Morphology Insights

Male infertility accounts for 40% of cases, with semen analysis being critical due to sperm’s 72-day development cycle. Conditions like oligospermia (low sperm count) and teratospermia (abnormal morphology) impact fertility, while Kruger morphology criteria predict IVF success rates. ICSI offers solutions for severe morphology issues.

---

Key Takeaways

Semen Analysis Variability: Why Repeat Tests Are Essential

Sperm develop over 72 days, causing monthly fluctuations in semen samples. Repeat analyses three weeks apart are necessary to account for temporary factors like illness, medications, or lifestyle changes affecting sperm quality.

Sperm Morphology and Fertilization Success Rates Revealed

Kruger ‘strict criteria’ morphology shows men with <4% normal sperm have only 8% fertilization success via standard IVF. ICSI bypasses this by injecting a single sperm directly into the egg, achieving high pregnancy rates even with poor morphology.

Oligospermia, Azoospermia, and Asthenospermia Explained

Oligospermia (<20M/mL sperm) and azoospermia (no sperm) reflect quantity issues, while asthenospermia refers to poor sperm motility. These conditions require specialized treatments like ICSI or hormonal therapy depending on root causes.

ICSI Treatment for Low Sperm Morphology: Success Rates

Intracytoplasmic Sperm Injection (ICSI) achieves >70% fertilization success by selecting morphologically normal sperm under strict criteria. This technique is critical when natural fertilization is unlikely due to teratospermia (<4% normal sperm).

Why Kruger Morphology Criteria Matter in Male Fertility Diagnosis

Unlike outdated WHO standards, Kruger’s strict morphology assessment correlates directly with IVF outcomes. Men with 14-40% normal sperm morphology achieve optimal fertilization rates, while those below 4% require advanced interventions like ICSI.

---

Source: Read full article