London Fertility Centre worked hard to make the process as easy as possible


Percutaneous Epididymal Sperm Aspiration (PESA), Testicular Sperm Aspiration (TESA) and Microdissection Testicular Exploration and Sperm Extraction (MicroTESE) are surgical techniques used to help men who are not producing sperm (non-obstructive azoospermia). London Fertility Centre developed the PESA procedure and the world’s first PESA baby was born through us

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Is surgical sperm retrieval for me?

PESA, TESA or MicroTESE is used to help you have a baby if you do not produce sperm in your ejaculate. This may be because you have had a vasectomy, or it could occur naturally. The surgical procedure is carried out under local or general anaesthetic and is generally used alongside ICSI fertility treatment.


What is the difference between PESA, TESA and MicroTESE?

PESA is the least complex procedure and can be used if there are sperm present in your epididymis (a tube connected to your testicle and important for sperm transport and maturation). A needle is inserted into your epididymis and sperm is withdrawn. You will typically be able to return to work the following day.

TESA is slightly more complex. If we cannot find sperm in your epididymis, we will move on to the TESA procedure where sperm is extracted directly from the testicles using a needle. You may experience discomfort for a few days following the procedure.

MicroTESE is used if we are not able to find sperm using PESA or TESA or if you have non-obstructive azoospermia. This is performed under general anaesthetic and the testicle is opened and examined under a high powered operating microscope. We search for the best areas of tissue within the testicle that are likely to contain sperm. These are removed and examined by an embryologist until we find sperm or all areas of the testicle have been checked.

Our MicroTESE procedures are carried out by one of the UK’s leading specialists, Mr Asif Muneer Consultant Urological Surgeon and Andrologist.