Y Chromosome Microdeletion

About the Test

The Y-Chromosome Microdeletion PCR test is a molecular diagnostic assay used to detect microdeletions in specific regions of the Y chromosome known as azoospermia factor (AZF) regions. These regions—AZFa, AZFb, and AZFc contain genes essential for spermatogenesis.

Microdeletions in these regions can disrupt sperm production, leading to severe male infertility. The Y-Chromosome Microdeletion PCR test uses polymerase chain reaction (PCR) technology to identify the absence of specific genetic markers.

Why Consider This Test?

The Y-Chromosome Microdeletion PCR test is crucial in identifying genetic causes of male infertility, particularly in cases of:

• Azoospermia (no sperm)
• Severe oligospermia (very low sperm count)

Clinical Importance

• Helps determine cause of spermatogenic failure
• Guides treatment decisions in assisted reproduction
• Prevents unnecessary invasive procedures

Types of Deletions

• AZFa deletion → Severe spermatogenic failure
• AZFb deletion → Arrest in sperm development
• AZFc deletion → Variable sperm production; may allow sperm retrieval

Who Should Get This Test Done?

Primary Indications

• Men with azoospermia
• Men with severe oligospermia

Secondary Indications

• Couples undergoing IVF/ICSI
• Men with unexplained infertility

More Information

Clinical Implications

• Certain deletions are irreversible and hereditary
• Male offspring may inherit the same deletion

Recommendations

• Genetic counseling is essential
• Results should guide reproductive planning