ben bunting BA(Hons) PgCert Sport & Exercise Nutriton  Written by Ben Bunting: BA(Hons), PGCert.


PESA has a higher success rate than MESA, and is recommended for patients who have ductal obstruction distal to the epididymis. However, PESA is not a suitable substitute for MESA in all cases, including patients with severe epididymal obstruction.

Microsurgical Epididymal Sperm Assemblage Explained

The procedure of Microsurgical Epididymal Sperm Assemblage (MESA) is a safe office-based procedure in which the physician retrieves sperm from the epididymis. During this procedure, millions of motile sperm can be recovered for cryopreservation. The procedure has advantages over traditional open or percutaneous approaches. It should achieve a sperm retrieval rate of over 90%.

Microsurgical Epididymal Sperm Assemblage (MESA) is a highly accurate procedure that allows for extensive collection of sperm in men with epididymal or vasal obstruction. This procedure can be performed on a scheduled basis or coordinated with the egg retrieval of the female partner. The procedure is performed under general anesthesia and involves the use of an operating microscope. The sperm are then cryopreserved for future IVF.

MESA is considered the gold-standard method of sperm retrieval. It is safe, has a high sperm yield, and can produce comparable ICSI fertilization rates to those of ejaculated sperm. MESA works by identifying a sperm-containing epididymal tubule and aspirating the epididymal fluid. The sperm are then transferred to a laboratory for cryopreservation.

Microsurgical Epididymal Sperm Assemblage (MESA) is a common procedure for infertile men. It is a minimally invasive procedure that utilizes a high-powered optical microscope to collect the sperm. It is a great option if you are trying to conceive, but if you're not sure whether this procedure is for you, seek medical advice.

The procedure is simple and easy to perform. The procedure can take anywhere from 20 to 30 minutes and can be performed by a doctor. Local anesthesia is given beforehand. During the procedure, a needle is inserted into the epididymis and gentle suction is applied to aspirate the fluid. After the fluid is aspirated, the surgeon will examine the sperm under a microscope to determine whether it is viable. If not, further procedures may be required.

MicroTESE has become a standard procedure for male infertility. It involves the microdissection of the testicle under a microscope to find the sperm-producing tubes. This procedure has a higher success rate than traditional sperm-harvesting techniques. It is also safer, since less tissue is removed from the testis. The sperm can then be preserved for future IVF cycles.

It is a surgical procedure, and it is performed under local anesthesia. While the procedure is not necessary in all cases of infertility, men with obstructive azoospermia may still need it. The procedure is often recommended for patients who have severe problems with the ejaculatory duct or vas deferens. Although sperm retrieval isn't necessary in every case, a couple should discuss the procedure with their doctor before it is performed.

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Microsurgical Epididymal Sperm Assemblage Side Effects

Microsurgical Epididymal Sperm Association (MESA) is a surgical procedure to collect sperm from a man's epididymis. The epididymis is a long coiled tube that stores sperm and develops the ability to move around. The procedure can be painless and can be performed under local or mild sedation. The success rate is over 95%.

The sperm and epididymis have the same GPER protein. Both of these proteins are involved in the maturation process of sperm. Both GPER and epididymal ca2+-ATPase are present in the epididymis of an adult male.

After the procedure, the spermatozoa were sorted using single-layer centrifugation. They were then tested for motility and apoptosis. Compared to the control group, the number of sperm in the LC group was significantly higher than in the DM group. However, the number of cauda epididymal sperm was significantly lower than in the DM model group.

Microsurgical Epididymal Sperm Associating procedures are not risk-free and may result in side effects. For example, one study found that L-carnitine (LC) increased epididymal sperm count and sperm motility after the procedure.

One clinical side effect of Microsurgical Epididymal Sperm Associatiosis is subfertility. Approximately one in eight couples fails to conceive spontaneously within a year of unprotected intercourse. In up to 55% of these couples, the male partner is diagnosed with spermatogenic failure. When a male partner fails to conceive spontaneously, one or more of his semen parameters falls below the WHO cut-off of normozoospermia. The same is true for female parameters.

Percutaneous Epididymal Sperm Aspiration Explained

Percutaneous epididymal sperm aspiration is a surgical procedure that involves removing sperm-containing fluid from the epididymis. This fluid is then processed for intracytoplasmic sperm injection (ICSI) in order to instigate fertilization or pregnancy. This procedure is considered the gold standard for sperm retrieval in men with obstructive azoospermia. This procedure is extremely delicate and requires microsurgical expertise. It is primarily used in ICSI, as it is a necessary component of ICSI.

The process involves exposing the epididymal tubules with a careful incision. An ophthalmic microknife is then used to puncture the epididymal tubules. Afterward, the sample is put under a microscope to determine the quality of the sperm. The sperm from the epididymis are generally better quality than those from the testicle, since they have had more time to mature. This means that they are better suited for fertilization and other future uses.

Although there are other methods for sperm retrieval, aspiration is the most common option for men with normal sperm production. It is usually performed under local anesthesia and takes less than ten minutes. Compared to other methods, this procedure is the least expensive and easiest.

If IVF treatments do not work, or PVS or EEJ did not work, a more advanced technique may be needed. A specialist in Houston can perform PESA and other procedures to remove sperm. This method allows fertility specialists to collect the sperm and move forward with IVF or intracytoplasmic sperm injection.

Percutaneous epididymal sperm aspiration is the least invasive technique for sperm retrieval. This procedure uses a needle to collect sperm from the epididymis, the coiled tube located at the back of the testicle. Sperm may be stored in a freezer for later use or used during an ICSI-IVF cycle. PESA is particularly useful in men with obstructive azoospermia and those born without vas deferens. It may not be a permanent solution and may require multiple cycles.

The success rate of MESA depends on the experience of the center performing the procedure. Centers that have the most experience with the procedure have consistently high success rates for IVF/ICSI using ejaculated sperm. Another important factor in the success of MESA is the microsurgical technique. Microsurgical epididymal sperm aspiration enables precise hemostasis during the procedure and minimal contamination of epididymal fluid.

While many couples do not have enough sperm in the penis to produce an egg, a minimally invasive procedure can increase the odds of getting pregnant. With the right procedure, men who don't have enough sperm can become fathers. It is a successful way to conceive a child. It is the first step towards a family. There are many options to help men conceive.

In our clinic, MESA-ICSI has helped 81 couples with obstructive azoospermia. Eighty percent of patients underwent the procedure and had successful results. The sperm recovered from the epididymis were cryopreserved. In seventy-seven percent of cycles, clinical pregnancies were achieved, and 65% of cycles resulted in ongoing pregnancies.

Percutaneous Epididymal Sperm Aspiration Side Effects

Percutaneous epididymal sperm aspiration (TESE) is a procedure used to collect sperm from the epididymis. The procedure involves making several incisions in the epididymis. A hypodermic needle is attached to a syringe, which is then inserted into the corpus. Gentle negative pressure is applied while aspirating the epididymal fluid, which is then sent to the laboratory for testing.

PESA is usually performed under local anesthesia and is a straightforward procedure. A needle, about 21-26 gauge, is inserted through the epididymis and the fluid is aspirated to determine if the sperm are viable. This procedure can be diagnostic or therapeutic, and can be performed the same day as oocyte retrieval. Unlike other sperm retrieval procedures, PESA is quick and has very minimal side effects. There is minimal skin incision, and minimal instruments are used. However, there is a risk of secondary obstruction or clogging of the epididymis.

The procedure can cause adverse side effects if the epididymis is damaged, which will impede future sperm in the ejaculate. However, if the procedure is performed properly, it can lead to a successful retrieval of sperm.

Percutaneous Epididymal Sperm Assemblage (PESA) is a minimally invasive procedure that is used to remove sperm from men with OA. This procedure is similar to TESA but harvests sperm from a more mature epididymis, which may be better preserved after cryopreservation. It is usually reserved for men with obstructive azoospermia.


The primary difference between MESA and PESA is the amount of incision needed to complete the procedure. In MESA, the incisions are made in the lateral portion of the scrotum, whereas in PESA, the incisions are made in the anterior region. Both procedures use parallel stay sutures to secure the epididymis in place. Pre-placed sutures are often secured to a drape to prevent migration.

The two procedures are best for men who have an enlarged epididymis after vasectomy. Both procedures are relatively painless and don't require a general anesthetic. However, there are risks of bleeding and damage to the epididymis. Additionally, the procedures do not find sperm during the procedure and require a subsequent procedure to collect them. However, these risks can be reduced with more advanced methods.

Cost effectiveness is a critical consideration when choosing between MESA and PESA. MESA is a more expensive procedure, while PESA is the cheaper alternative. PESA is also more readily available and less invasive. Many publications have argued that PESA/TESA is the better option over IVF, and cost effectiveness is a primary consideration.