What is obstructive azoospermia?
Obstructive azoospermia (AO), also known as obstructive azoospermia , is a cause of male infertility in which sperm are not observed in the ejaculate due to the obstruction of the seminal ducts that allow the exit of the semen to the outside.
It is a less serious fertility problem than secretory azoospermia . In this article we tell you the different options to have a child even suffering from obstructive azoospermia.
Below you have an index with all the points that we will discuss in this article.
Index- 1. Most common causes
- 2. Diagnosis
- 3. Treatment
- 4. Pregnancy with obstructive azoospermia
- 4.1. Testicular biopsy
- 4.2. Sperm aspiration
- 5. Questions from users
- 5.1. Why does vasectomy produce azoospermia?
- 5.2. Can cystic fibrosis be caused by obstructive azoospermia?
- 5.3. Is natural pregnancy possible if I have obstructive azoospermia?
- 6. Recommended reading
- 7. Bibliography
- 8. Authors and collaborators
Most common causes
The obstruction of the seminal ducts responsible for transporting sperm can have various causes.
Obstructive azoospermia due to blockage of the seminal ductsThe main ones are the following:
- Vasectomy: the seminal channels are obstructed voluntarily as a contraceptive method.
- Complications in a surgical intervention that cause the cutting or blockage of some sperm transport conduit.
- Some congenital or genetic alterations can cause the ducts not to develop correctly. An example is bilateral cryptorchidism.
- Diseases such as mumps or meningitis that children suffer before puberty can hamper sperm channels.
- Inflammation, cysts or trauma, either in the testicles, the epididymis, the prostate, the urethra or the vas deferens.
If you want more information about it, you can consult the following article: The causes of azoospermia.
Diagnosis
Patients suffering from obstructive azoospermia have normal hormone levels and testicular size.
For this reason, to certify that they suffer from this alteration of fertility it is necessary to perform several seminograms and check through a testicular biopsy that the testicles are capable of producing sperm.
The meticulous palpation of the testicle will help the specialist to understand if there is or not spermatogenesis (production of sperm), although there will be no certainty until the biopsy is performed.
Subsequently, you must discover exactly where the obstruction is located. In this way, we will know at what point we can extract sperm to be able to apply the appropriate assisted reproduction technique in an attempt to achieve pregnancy.

Questions from users
Why does vasectomy produce azoospermia?
By Zaira Salvador (embriologist).Vasectomy is a surgical procedure that consists of the section and subsequent ligation of the vas deferens. In this way, no sperm are found in the ejaculated semen, that is, it produces azoospermia of the obstructive type. Read more
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