If the cells are chromatin positive, the diagnosis is made; testicular biopsy and karyotyping are not necessary.

However, often this distinction is not clear and the differentiation between obstructive versus non-obstructive azoospermia may require a testicular biopsy.

(i) Collect testicular biopsy in 1% hypotonic sodium citrate solution.

As an alternative to open testicular biopsy for the last 40 years, it has helped to characterize states of human male infertility due to defective spermatogenesis.

Guide a biopsy needle for testicular biopsy when testing for infertility.

Prof Nayernia and his team proposed that similar cells could be extracted from men using a simple testicular biopsy.

House tells them to start Jack on prednisone and get a testicular biopsy - if Jack has any real inflammation, it will be down there.