In a testicular biopsy (TESE), a small piece of testicular tissue is removed and sperm is extracted from it.
In sperm cell extraction through a testicular biopsy, a difference is made between two types of procedures: For the TESE method sperm cells are extracted directly from the testicles, and in the MESA method from the epididymis.
As it is only possible to extract very few sperm cells in a testicular biopsy, it is almost always necessary to carry out a treatment with IVF and ICSI-techniques. Only with these techniques is it possible to achieve a fertilization of the oocyte with very few sperm cells.
Reasons for a testicular biopsy:
- Azoospermia: No sperm cells in an ejaculation
- Aspermia: No ejaculation
- Cryptozoospermia: Very few sperm cells in an ejaculation
- Necrozoospermia: No live sperm cells in an ejaculation