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What is the difference between cryptozoospermia and azoospermia?

By Zaira Salvador B.Sc., M.Sc. (embryologist).
Last Update: 04/23/2018

It is not unusual that, when seeing that the sperm count is zero, sperm samples are diagnosed with azoospermia instead of cryptozoospermia.

The difference between azoospermia and cryptozoospermia is decisive, since a wrong diagnosis may lead to a testicular biopsy or epididymal sperm aspiration to retrieve sperm when there are viable sperms in the ejaculate, but only a few. The difficulty here is being able to find this few sperm in order not to be mistaken.

To avoid errors and provide the patient with the appropriate diagnosis of cryptozoospermia, the most advisable is to repeat the semen analysis. This time, the semen sample should be examined after having gone through a centrifugation process.

 Zaira Salvador
Zaira Salvador
B.Sc., M.Sc.
Embryologist
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI)
License: 3185-CV
Embryologist. Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI) License: 3185-CV.