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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Serum inhibin-B weakly indicates presence of sperm cells in the testes, raising chances for successfully achieving nno through testicular sperm extraction TESEalthough the association is not very substantial, having a sensitivity of 0.

Association between failure to impregnate after vasovasostomy and sperm agglutinins in semen Lancet ; 17 1: Pretesticular azoospermia may be caused by congential hypopituitarismKallmann syndromePrader-Willi syndrome and other genetic conditions that lead to GnRH or gonadotropin deficiency.

Percutaneous testicular sperm aspiration: Who asks for vasectomy reversal and why BMJ, ; Tiepolo L, Zuffardi O. Its use and limitations. Men with infertility caused by AZFc delection can produce sons by intracytoplasmatic sperm inyection, but are likely to transmit the deletion and infertility.

Endocrinol Rev ; Infobox medical condition All articles with unsourced statements Articles with unsourced statements from April Pregnancy after intracytoplasmic inyection of a spermatid. Viable embryos from inyection of round spermatids into oocytes. Review of our results during the last 5 years.

Hum Genet ; Teratozoo spermia – sperm with abnormal morphology.

Antibody mediated cause of male infertility. A chance of fertility in non-obstructive azoospermia. Cambridge University Prees; Urol Clin North Am ; Surgical procedures performed on the urogenital organs or hernia repair can result in scarring that leads to a blockage.



A major advancement in recent years has been the introduction of IVF with ICSI which allows successful fertilization even with immature obstruchiva or sperm obtained directly from testicular tissue. OA means that sperm are being produced normally inside the testicle, but there is a blockage or obstruction in the reproductive tubing that is preventing the sperm from flowing to the outside world.

Pre- and post-testicular azoospermia are frequently correctible, while testicular azoospermia is usually permanent. An updated systematic review and collaborative meta-analysis”. Chemotherapy may suppress spermatogenesis.

micro-TESE: más esperanzas para pacientes con azoospermia

J endocrinol Invest ; The workup of azoospermic males”. Hormonal treatment can be included to stimulate sperm production or a testicular biopsy may be carried out. So, while one area might have scarred tubules with SCO pattern, another area might have some germ cells and some mature sperm. Hum Reprod ; 15, A history of surgical procedures of the genital system needs to be elicited.

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 applied to statistically predict patient outcomes. Most men who undergo these treatments will have sperm production resume within two years following therapy, depending on the type of treatment received.

Mol Human Reprod ; 2: Overwhelming Oxidative Stress causes sperm damage There are numerous causes of male infertility but no matter what the etiology, the final common pathway to sperm damage DNA fragmentation is through free radical peroxidation leading to overwhelming amounts of oxidative stress on the sperm.

Low levels of LH and FSH with low or normal testosterone levels are indicative of pretesticular problems, while high levels of gonadotropins indicate testicular problems.


One of the most important things we have learned about the testicle in the last 20 years is that sperm production in the abnormal situation is not homogeneous, meaning it is not the same or constant in all areas of the testicle. Infertility in men with cystic fibrosis.


New England J med. Phillip Werthman to learn about your male reproduction options and get all of your questions answered. Canadian Urological Association Journal.

Detection of aneuploidy for chromosomes 4, 6, 7, 8, 9, 10, 11, 12, 13, 17, 18, 21, X azoospremia Y by fluorescence in-situ hybridization in spermatozoa from nine patients with oligoasthenoteratozoospermia undergoing intracytoplasmatic sperm inyection.

Thus men with azoospermia due to hyperprolactinemia may resume sperm production after treatment of hyperprolactinemia or men whose sperm production is suppressed by exogenous androgens are expected to produce sperm after cessation of androgen intake.

Induction of puberty in men by azoosperjia pulsatile administration of low-dose gonadotropin releasing hormone.

The causes can be genetic, congenital or acquired.

In situations where the testes are normal but unstimulated, gonadotropin therapy can be expected to induce sperm production. Not to be confused with aspermiawhich refers to the absence of semen in a male.

Generally, men with unexplained hypergonadotropic azoospermia need to undergo a chromosomal evaluation. An update on the clinical assessment of the infertile male.