RESUMEN
For men presenting azoospermia, the development of ICSI with epidydimal (MESA) or testicular (TESE) sperm, allowed them to father their own progeny. Little is known about the issue of these ICSI, in terms of efficiency and quality of the conceptus, and many controversies remain. Some studies emphasized that children born after Assisted Reproductive Technology (ART) with surgically sperm retrieved were at increased risk of birth defects. In this context, we proposed a retrospective analysis of pregnancy issues with non-ejaculated sperm.
Asunto(s)
Inyecciones de Esperma Intracitoplasmáticas/estadística & datos numéricos , Espermatozoides/fisiología , Azoospermia/clasificación , Eyaculación , Femenino , Humanos , Masculino , Registros Médicos/estadística & datos numéricos , Embarazo , Resultado del Embarazo , Recuperación de la EspermaRESUMEN
Microdeletions of the long arm of the human Y chromosome are associated with spermatogenic failure and have been used to define three regions of Yq (AZFa, AZFb, and AZFc) that are recurrently deleted in infertile males. In a blind study we screened 131 infertile males (46 idiopathic and 85 nonidiopathic) for Y chromosome microdeletions. Nineteen percent of idiopathic males, with an apparently normal 46,XY chromosome complement had microdeletions of either the AZFa, AZFb, or AZFc region. There was no strict correlation between the extent or location of the deletion and the phenotype. The AZFb deletions did not include the active RBM gene. Significantly, a high frequency of microdeletions (7%) was found in patients with known causes of infertility and a 46,XY chromosome complement. These included deletions of the AZFb and AZFc regions, with no significant difference in the location or extent of the deletion compared with the former group. It is recommended that all males with reduced or absence sperm counts seeking assisted reproductive technologies be screened for deletions of the Y chromosome.
Asunto(s)
Eliminación de Gen , Frecuencia de los Genes , Infertilidad Masculina/genética , Cromosoma Y/genética , Adulto , ADN/genética , Genotipo , Humanos , Infertilidad Masculina/etiología , Masculino , Oligospermia/complicaciones , Fenotipo , Método Simple CiegoRESUMEN
In all species, seasonal patterns in fertility are observed. In humans, seasonal variations of pregnancies are observed in spontaneous reproduction or in IVF. The most important factor seems to be sperm values and specially the morphology. Our study, on 188,075 cases (FIVNAT 1987-1995) shows significant variations of semen characteristics: we observe, in August, an improvement of sperm morphology.