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Find out the causes of male infertility and azoospermia from the experts at Center for Male Reproductive Medicine & Vasectomy Reversal in Los Angeles. La azoospermia y la criptozoospermia son enfermedades relativamente comunes entre los varones, teniendo que recurrir a tratamientos de reproducción . Download Citation on ResearchGate | Casos clínicos de esterilidad secundaria por azoospermia obstructiva subsidiaria de reparación quirúrgica | Secondary.

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Cambridge University Prees; This is called Klinefelter Syndrome. Mol Human Reprod ; 2: The Urologic clinics of North America. Who asks for vasectomy reversal and why BMJ, ; The most common reason is a vasectomy done to induce contraceptive sterility.

AZOOSPERMIA | Clínica de Urología en Sevilla. Impotencia, Protesis y Curva de Pene.

Chemotherapy may suppress spermatogenesis. Necrozoo spermia – dead or immobile sperms. Pregnancy after intracytoplasmic inyection of a spermatid. In other projects Wikimedia Commons.

Its use and limitations. The incidence and possible relevance of Y-linked microdelection in babies borm after intracytoplasmic sperm inyection and their infertile fathers.

Hormonal treatment can be included to stimulate sperm production or a testicular biopsy may be carried out.

Generally, men with unexplained hypergonadotropic azoospermia need to undergo a chromosomal evaluation. This arrest in development can occur at an early or late stage of the sperm maturation process. Among the biggest drug-related causes of NOA are testosterone and azoospermix anabolic steroids. BRD7a transcription regulatory protein, is normally highly expressed in the testis.



Both are usually performed under local anesthesia, but can be performed with sedation if necessary depending on the case, and on an outpatient basis no need to be admitted to the clinic. Defects in this area can lead to oligospermia or azoospermia, however, a tight genotype-phenotype correlation has not been achieved.

Pretesticular azoospermia may be caused by congential hypopituitarismKallmann syndromePrader-Willi syndrome and other genetic conditions that lead to GnRH or gonadotropin deficiency. Quinzii C, Castellani C.

Teratozoo spermia – sperm with abnormal morphology. J Urol ; The causes can be genetic, congenital or acquired.


Microsurgical TESE and the distribution of spermatogenesis in non-obstructive azoospermia. In practice, we distinguish two types of azoospermia: Hum Genet ; Review of our results during the last 5 years.

Kerem E, Rave-Harel N. November 14, at 2: These include chromosomal abnormalities where the number of chromosomes is not as it should be called aneuploidy or parts of the chromosome arms break off and switch locations called translocations.


Screening for AZF delection in a large series of severly impaired spermatogenesis patients. Azoospermia can be divided into two broad categories: This is typically a worst-case-scenario cause of NOA.

No differences in outcome after intracytosplasmatic sperm inyection with fresh or with frozen-thawed epididimal spermatozoa. FSH levels tend to be elevated hypergonadotropic as the feedback loop is interrupted lack of feedback inhibition on FSH.


This diagnosis should be based on at least two semen samples with a gap between them of about 4 weeks. Genetic screening for patients with azoospermia and severe oligo-asthenospermia.

Since we now have a much better understanding of the mechanisms of sperm damage and locations in the reproductive tract where damage may occur, more sophisticated functional tests to identify problems have been developed and the information can be azoospermi to statistically predict patient outcomes.

This is one of the most important reasons why a male reproductive specialist must examine someone with an abnormal sperm count.

Posttesticular azoospermia can be seen with certain point mutations in the cystic fibrosis transmembrane conductance regulator CFTR gene commonly associated with congenital vas deferens abnormalities. The investigation includes a history, a physical examination including a thorough evaluation of the scrotum and testes, laboratory tests, and possibly imaging.

Genetics disorders and infertility.: Genetic causes of azoospermia are not reversible but most men with genetic issues still produce small amounts of sperm within the testicles that can be used to father normal children. It is established on the basis of two semen analysis evaluations done at separate occasions when the seminal specimen after centrifugation shows no sperm under the microscope and requires a further work-up.

Hum Genet, ;