Congenital absence of the vas deferens
(CAVD) can be either unilateral (CUAVD) or bilateral (CBAVD) and this clinical condition is responsible for up to 1-2% of male infertility.
The cyst of the right seminal vesicle, from which comes the dilated right vas deferens
In order to examine the nature of antagonism (reversible or irreversible) by MMC on DA/NA-evoked contractile response in isolated rat vas deferens
, log dose-response curves of DA/NA in absence and presence of MMC (120 mg/mL, 10 min incubation) were carried out.
In species of Morula the development of imposex is unique in that development of vas deferens
takes place before the formation of penis in certain individuals and more commonly the blistering and folding of the tissue epithelium behind the right tentacle can be observed, with the penis being generally limited to a small bud-like structure less than 1 mm in size (Reitsema and Spickett, 1999).
The ampulla and vas deferens
are morphologically individualised and the initial formation of their lumen can be observed in this phase.
fmol/mg tissue Brain 59.90 Spinal Cord 37.72 Illeum 32.83 Duodenum 19.10 Vas deferens
19.53 Note: Table made from bar graph.
It narrows to the bifurcation of the vas deferens
Testicular CFTR splice variants in patients with congenital absence of the vas deferens
. Hum Mol Genet 1998;7:1739-44.
nasicus from the southwestern extreme of its range undergoes a postnuptial spermatogenesis = aestival spermatogenesis (sensu Saint Girons 1982) which is completed before winter with sperm stored over winter in the vas deferens
. All vasa deferentia (n = 16) contained sperm: May (1), August (2), September (6), October (7).
Roosters were euthanized according to NOM-033-SAG/ZOO-2014 (Norma Oficial Mexicana, 2015), in order to obtain spermatozoa from the testicle and the different vas deferens
regions (cranial, medial, and caudal).
Wang and colleagues wondered if they could use a similar approach to inject layers of materials to block the vas deferens
, the duct that conveys sperm from the testicle to the urethra.
The cause of the extremely rare failure is recanalisation of the vas deferens
that was initially cut.