A couple complains of primary infertility in spite of staying together for 4 years and having unprotected intercourse, all tests in a wife are normal. Semen analysis shows a volume of 0.8 ml/ sperm count is 0, fructose is absent what is done next?
**Core Concept**
The couple's primary infertility is likely due to a male factor, given the normal test results in the wife. The semen analysis indicates azoospermia (no sperm) with low semen volume and fructose absence, suggesting a possible obstruction or absence of the seminal vesicles.
**Why the Correct Answer is Right**
The absence of fructose in the semen suggests that the seminal vesicles are not contributing to the semen, which is a key component of the male reproductive system. The seminal vesicles produce fructose, which serves as an energy source for the sperm. Azoospermia and low semen volume further support the possibility of a blockage or absence of the seminal vesicles. In this case, a vasal or vesiculography would be the next step to diagnose the underlying cause, which could be a congenital or acquired obstruction.
**Why Each Wrong Option is Incorrect**
**Option A:** A testicular biopsy is not the next step as it would not directly address the absence of fructose in the semen or the azoospermia. It is more relevant for diagnosing testicular issues such as hypogonadism or testicular failure.
**Option B:** A semen culture is not indicated as the absence of fructose and azoospermia is more suggestive of a structural issue rather than an infectious process.
**Option C:** A prostate-specific antigen (PSA) test is not relevant in this scenario as the issue is likely related to the seminal vesicles rather than the prostate gland.
**Clinical Pearl / High-Yield Fact**
In cases of primary infertility, it is essential to consider the male factor, and a thorough semen analysis is crucial in identifying potential causes.
**Correct Answer: C. Vasal or vesiculography is the next step in this scenario.**