aspermia


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Related to aspermia: phimosis, polyzoospermia

aspermia

 [ah-sper´me-ah]

a·sper·mi·a

(ā-sper'mē-ă, ă-sper'),
Lack of secretion or expulsion of semen following ejaculation.

a·sper·mi·a

(ā-spĕr'mē-ă)
Inability to produce or ejaculate semen.

aspermia

The absence of spermatozoa in the semen or the inability to ejaculate semen. Obstructive aspermia is due to the blockage of the VAS DEFERENS on both sides. This may be congenital or acquired from infection or injury, or from VASECTOMY. CYSTIC FIBROSIS causes aspermia as a result of failure of development of the vas or associated structures.
References in periodicals archive ?
Type Phenotype References ob/ob mice Testicular atrophy Decrease [40] nuclear volume of Sertoli cells, spermatogonia, and spermatocytes ob/ob mice Infertile Reduction of testis [41] weight, multinucleated spermatids, few spermatozoa, and anormal Leydig cells db/db mice Infertile [43] db/db mice Infertile Impairment of [14] spermatogenesis and sperm motility fa/fa rat (Zucker rat) Alteration in sperm production [45] and sperm DNA damage AdipoR2 Seminiferous tubular atrophy [54] with aspermia and reduced testicular weight AdipoR2 Decrease of testis weight [58]
Moreover, stress in males with conditions like severe oligospermia, teratozoospermia, azoospermia, aspermia was 6 times greater than those with mild to moderate oligospermia, oligoasthenospermia in comparison to those diagnosed with normospermia or no urological abnormality.
MRDT (male reproductive developmental toxicity): sperm effects, histological effects, and tissue weight change were reported exclusively in developmental studies, plus all malformations; tumor location and methods used for sperm count were not specified in ToxRefDB; general histological effects include inflammation, necrosis, and pigmentation, in contrast with spermatogenesis-specific histological effects such as aspermia, immature sperm, and retained spermatids.
In the rose-ringed parakeets, the period of aspermia in April had begun already before the endoscopic procedure.
Estos niveles y grados de esterilidad se clasifican de la siguiente manera: azoospermia (ausencia de espermatozoides en el eyaculado), normozoopermia (concentracion de espermatozoides, 4 millones en total o mas), oligozoospermia (concentracion de espermatozoides, menos de 4 millones en total), astenozoospermia (menos del 50% de espermatozoides con progresion lineal o menos del 25% con progresion rapida), teratozoospermia (menos del 50% de espermatozoides con morfologia normal), necrozoospermia (menos del 50% de espermatozoides no viables), y Aspermia (ausencia de eyaculado externo).