Genital Duct Anomalies

2009 ◽  
Author(s):  
Joe Leigh Simpson
Keyword(s):  
Genital Duct

scholarly journals Genital Duct Development on Streak Gonad Side in Fifteen Children with 45, X and Y-containing Chromosome Mosaicism

1993 ◽  
Vol 2 (1) ◽  
pp. 27-32
Author(s):  
Yoshihiro Kakizawa ◽  
Reiko Ito ◽  
Itsuro Hibi ◽  
Ayako Tanae ◽  
Toshiaki Tanaka ◽  
...  
Keyword(s):  
Genital Duct ◽  
Chromosome Mosaicism ◽  
Duct Development

Reproductive cycle of Bolinus brandaris and penis and genital duct size variations in a population affected by imposex

2002 ◽  
Vol 82 (3) ◽  
pp. 435-442 ◽  
Author(s):  
Montserrat Ramón ◽  
María José Amor
Keyword(s):  
Reproductive Cycle ◽  
Vas Deferens ◽  
Western Mediterranean ◽  
Spawning Season ◽  
Genital Duct ◽  
Penis Length ◽  
June July ◽  
A Site ◽  
Bolinus Brandaris

The reproductive cycle of Bolinus brandaris (Gastropoda: Muricidae) was investigated. Specimens were sampled monthly from a site off Sant Carles de la Ràpita, in the western Mediterranean, between February 1999 and March 2000. A pattern was observed in the reproductive cycle, with two reproductive peaks (April and June–July). The first stages of gametogenesis began in September for males and November for females. Mature males were found from December to April and from June to July. Maximum ripening in females was attained at the end of June and during July, coinciding with the spawning season. In May, there was a resting stage in females, and for both sexes from August to October.Males exhibited variation in penis length and vas deferens width related to the reproductive cycle. Sizes of both dimensions increased as maturation progressed. The variation was not found in imposex females.

scholarly journals Unusual dual genital duct remnants in true hermaphroditism.

1988 ◽  
Vol 25 (3) ◽  
pp. 206-208 ◽  
Author(s):  
C Williams ◽  
I A Hughes
Keyword(s):  
Genital Duct ◽  
True Hermaphroditism

Development of the Genital Duct System in the Protandrous Black Porgy, Acanthopagrus schlegeli

2011 ◽  
Vol 294 (3) ◽  
pp. 494-505 ◽  
Author(s):  
Mong-Fong Lee ◽  
Jing-Duan Huang ◽  
Ching-Fong Chang
Keyword(s):  
Duct System ◽  
Genital Duct ◽  
Black Porgy ◽  
Acanthopagrus Schlegeli

scholarly journals The Genital Ducts of Some British Stenoglossan Prosobranchs

1941 ◽  
Vol 25 (1) ◽  
pp. 173-211 ◽  
Author(s):  
Vera Fretter
Keyword(s):  
Distal Region ◽  
Mantle Cavity ◽  
Proximal Region ◽  
Genital Duct ◽  
Male And Female ◽  
Pericardial Cavity ◽  
Egg Capsules ◽  
Buccinum Undatum ◽  
Nassarius Reticulatus ◽  
Female Genital

The foregoing pages include an account of the anatomy and histology of the male and female genital ducts of Ocenebra erinacea, Nucella lapillus, Nassarius reticulatus and Buccinum undatum. Observations have also been made on the mode of functioning of the ducts and the formation of the egg capsules.In both male and female it is possible to divide the genital ducts into a narrow and thin-walled proximal section which leads from the gonad and opens into a thick-walled glandular distal region, and in this respect the Stenoglossa agree with the mesogastropods. Near the junction of these two portions, in the female, arises the gonopericardial duct, which puts the genital duct into communication with the pericardial cavity; in males this structure i s lost or reduced to a vestige lying in a similar position.In males the upper part of the proximal region of the genital duct is used as a vesicula seminalis and the epithelium is capable of taking up and digesting effete or superfluous sperm. Sperms are passed from it into the anterior, distal region during the act of copulation, and secretion from the glands is mixed with them and provides the medium in which they are transferred to the female. In Ocenebra and Nucella this glandular region, the prostate, extends only as far as the opening of the mantle cavity, from which a continuation of the duct, without glandular walls, runs to the penis. The entire distal half of the male duct shows evidence of having been derived from an open seminal groove such as is found in Littorina.

scholarly journals GENITAL DUCT DEVELOPMENT ON STREAK GONAD SIDE IN FIFTEEN CHILDREN WITH 45, X AND Y-CONTAINING CHROMOSOME MOSAICISM

1993 ◽  
Vol 33 ◽  
pp. S17-S17
Author(s):  
T Tanaka ◽  
I Hibi ◽  
Y Kakizawa ◽  
R Ito ◽  
A Tanae ◽  
...  
Keyword(s):  
Genital Duct ◽  
Chromosome Mosaicism ◽  
Duct Development

The postnatal maturation of efferent tubules in the rat: a light and electron microscopy study

Development ◽  
1986 ◽  
Vol 96 (1) ◽  
pp. 51-63
Author(s):  
Sandro Francavilla ◽  
Sergio Moscardelli ◽  
Bernardino Bruno ◽  
Patrizio Scorza Barcellona ◽  
Cesare De Martino
Keyword(s):  
Electron Microscopy ◽  
Fluid Transport ◽  
Light And Electron Microscopy ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Seminiferous Tubules ◽  
Genital Duct ◽  
Postnatal Maturation ◽  
Postnatal Differentiation ◽  
Tubule Wall

The postnatal maturation of the epithelium and tubule wall of efferent tubules in the rat was investigated by light and transmission electron microscopy, from birth to 50 days of age, when sperms were released from the seminiferous tubules and appeared in the genital duct. At the end of the first week of life, an endocytotic apparatus is differentiated in the epithelial cells. During the third week of life, efferent tubules developed specializations for the transport of sperms and fluids, namely the appearance of ciliated elements interspersed among the principal cells of the epithelium, and differentiation of myoid elements in the tubule wall. The appearance of specializations related to endocytosis and fluid transport across the epithelium preceded the canalization of the seminiferous cords which, in fact, is reported to appear at the end of the second week of life in the rat, along with the initial secretion of testicular fluid. This suggested that the maturation of efferent tubules is not triggered by the passage of testicular fluid, as surmised for the postnatal differentiation of caput epididymis. The postnatal maturation of efferent tubules was almost complete 35 days after birth. The appearance of sperms in the genital duct of 50-day-old animals was not associated with any remarkable structural change.

The annual cycle of oviduct in Tarentola m. mauritanica L. (Reptilia, Gekkonidae)

1989 ◽  
Vol 10 (4) ◽  
pp. 371-386 ◽  
Author(s):  
O. Picariello ◽  
G. Ciarcia ◽  
F. Angelini
Keyword(s):  
Reproductive Cycle ◽  
Annual Cycle ◽  
Reproductive Effort ◽  
Southern Italy ◽  
Maximum Activity ◽  
Breeding Period ◽  
Genital Duct ◽  
Coelomic Cavity ◽  
Egg Retention ◽  
Short Period

AbstractThe oviduct of Tarentola mauritanica from southern Italy can be divided cranio-caudally into 5 regions: infundibulum that opens into the coelomic cavity, tuba, isthmus, uterus and vagina which opens into the cloaca. The changing morphology of these regions during the reproductive cycle is described. Unlike the male, the genital duct (epididymis) which is fully developed and secretory throughout the year, the oviduct shows a marked annual cycle with maximum activity in May-July. Seasonality would allow optimization of the reproductive effort. This gecko shows three ovulatory waves, namely in late May, June and July; at each time one calcareous cgg is produced per ovary. There is a short period of egg retention in the oviduct. The main breeding period takes place in spring; sometimes a second optional breeding may occur in autumn. Sperm is preserved inside the crypts of the tuba until the next spring.

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