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Oligospermia is a common cause of male infertility characterized by a reduced number of sperm in the ejaculate, typically below 15 million sperm per milliliter as per standard clinical guidelines. A lower sperm count decreases the likelihood of successful fertilization, especially when combined with issues in sperm motility or morphology.

The condition can result from multiple factors, including hormonal imbalances affecting testosterone production, genetic abnormalities, infections of the reproductive tract, or structural problems such as varicocele. Lifestyle factors like smoking, excessive alcohol consumption, obesity, stress, and exposure to heat or environmental toxins can also negatively impact sperm production.

Most men with oligospermia do not exhibit noticeable symptoms other than difficulty in achieving pregnancy with their partner. Diagnosis is primarily made through semen analysis, often repeated to confirm consistency. Additional tests, such as hormonal profiling or scrotal ultrasound, may be required to identify underlying causes.

Treatment depends on the cause and severity. It may include lifestyle modifications, medications to correct hormonal issues, surgical intervention for varicocele, or assisted reproductive techniques like intrauterine insemination (IUI) and in vitro fertilization (IVF). Early intervention can significantly improve fertility outcomes.