Answer from: Raúl Olivares, MD
TESA stands for Testicular Sperm Aspiration, and it works by inserting a very thin needle in different parts of testicles depending on the case. We may get the sperm from epididymides or directly from testicles, and then with a gentle aspiration, you get a part of this tissue, and you send this aspiration to the laboratory where they can identify sperm.
It is usually done if there is azoospermia, either obstructive, for example, in cases of a vasectomy or when there are a vasa deferens agenesia or in cases of secretory azoospermia and the testicles do not produce any sperm, and we can only get it from the testicle.
It must be said that in cases of secretory azoospermia, the aspiration tends not to be very efficient. It is really difficult to obtain sperm just with aspiration, and we may need to do a biopsy.
Answer from: Andris Abele, MD
Medical term TESA means testicular sperm aspiration. It is done with local or intravenous anesthesia in the operating room or office and is coordinated with the egg retrieval of the patient’s female partner. A needle is inserted into the testicle and tissue containing sperm is aspirated. Aspirated sperm, later on, is used for in vitro fertilization procedure, which is a type of assistive reproductive technology. TESA is usually performed for men with obstructive azoospermia – a condition when semen contains no sperm due to male reproductive system obstruction, for example, after vasectomy.
What is a medical definition of TESA and how it is used in IVF?
TESA is performed with a needle, which is inserted in the testicle to obtain sperm for IVF/ICSI treatment. How exactly does it work? When is it indicated?