2 edition of Morphology of epididymal spermatozoa from inbred and linecross bulls found in the catalog.
Morphology of epididymal spermatozoa from inbred and linecross bulls
H. A. Turner
Written in English
|Statement||by Harley Allen Turner.|
|The Physical Object|
|Pagination||34 leaves, bound :|
|Number of Pages||34|
Morphology refers to the number of sperm that have perfectly normal shapes. In my experience, the morphology reading is the one semen analysis parameter that generates the most confusion among clinicians and anxiety among couples. Epididymis and sperm maturation. Anim. Reprod., v, (Suppl.1), p Hammerstedt, ). In addition, 3 [HCO-] and [Ca2+] are key factors of the luminal epididymal fluid, which could directly control intracellular cAMP concentrations in the epididymal spermatozoa and consequently.
The adult epididymis is a highly convoluted tubule that performs a variety of functions including sperm protection, maturation, concentration and storage. transfer of mature epididymal spermatozoa to media of composition mimicking that of female tract fluids will encourage hypotonic swell- Changes in sperm morphology during epididymal transit Within the epididymis, spermatozoa also undergo changes in their morphology, notably that of their head and their cytoplasm. When.
timately deal with epididymal function. For instance, ques-tions dealing with the fate of sperm after vasectomy, the role of extracted epididymal sperm in assisted reproductive therapy, and ﬁnally, abnormal sperm morphology. Of course, the latter subject, teratozoospermia, may not immediately jump out to us as one dealing with epididymal. Caudal epididymal sperm morphology and body measurements relationships of the Gwembe dwarf bucks Accepted 2nd September, *, 1Kataba Andrew., 2Pares-Casanova Pere Miquel., 1Phiri Enos and 1Lundu Tapiwa 1Department of Biomedical Sciences, School of Veterinary Medicine, University of Zambia, P.O. Box , Lusaka, Zambia.
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Graduation date: Data were presented on epididymal spermatozoa from 29 inbred\ud and linecross bulls raised at Oregon State University in connection\ud with the Western Regional Beef Cattle Breeding Project, W The\ud inbred bulls came from four inbred lines.
Three of these inbred\ud lines were Herfords and the other line was Angus. Data were presented on epididymal spermatozoa from 29 inbred and linecross bulls raised at Oregon State University in connection with the Western Regional Beef Cattle Breeding Project, W The inbred bulls came from four inbred lines.
Three of these inbred lines were Herfords and the other line was : H. Turner. Results. The mean sperm concentration obtained was ± × 10 6 sperm/ml (Table 1).On average, about ± % of the spermatozoa had proximal cytoplasmatic droplets, and about ± % had median cytoplasmatic droplets (Table 1).As expected the cryopreservation had a detrimental effect on sperm’s quality, (Table 2).Epididymal sperm progressive motility Cited by: 5.
Rao AR, Bane A, Gustafsson BK. Changes in the morphology of spermatozoa during their passage through the genital tract in dairy bulls with normal and impaired spermatogenesis.
Theriogenology ; Stachecki JJ, Ginsburg KA, Leach RE, Armant DR. Computer-assisted semen analysis (CASA) of epididymal sperm from the Cited by: Morphology of epididymal spermatozoa in the ass (Equus asinus) and stallion (Equus caballus) Dr.
A.B. Elwishy. Corresponding Author. Department of Surgery and Obstetrics, Faculty of Veterinary Medicine, University of Cairo, Giza. Faculty of Veterinary Medicine, Makerere University, P. BoxKampala, : A.B. Elwishy.
Rao AR. Changes in the morphology of sperm during their passage through the genital tract in bulls with normal and impaired spermatogenesis. PhD Dissertation, Royal Veterinary College, Stockholm Sweden, Stachecki JJ, Ginsburg KA, Leach RE, Armant DR.
Computer-assisted semen analysis (CASA) of epididymal sperm from the domestic cat. One study comparing 93 inbred and linecross yearling Hereford bulls demonstrated that the inbreds were significantly inferior to linecrosses in estimated breeding values based only on semen evaluations (1).
In another study inbreeding of bulls was found to be associated with a significant increase in abnormal seminiferous tubules (2). Sperm morphology is poorly understood, and it can be subjective. Scores can vary on the same semen sample, in the same lab, using the same scoring techniques.
Most male fertility experts agree that the role of sperm morphology in predicting pregnancy is unclear, and that it's a poor predictor of infertility unless nearly % of the sperm are. 1. Introduction. Sperm abnormalities have long been associated with male infertility and sterility, such that their assessment is a fundamental component of the analysis of semen structure and morphology appear to have a major impact on the success rate of fertilization, early embryonic development and pregnancy rate in artificial reproduction practice.
Morphology of canine spermatozoa retrieved from different epididymal regions Proportions of spermatozoa with normal morphology were significantly higher in corpus (P=) and cauda (Pmorphological abnormalities of the head and neck/midpiece were similar in the three different epididymal regions.
Animal Epididymis analysed Time after thymidine Head Body Tail Duration of sperm designation injection (days) transit (days)' S 1 right - + + $2 left - + + S 1 left + + - $2 right + + - ~Based on the most advanced sperm labelled found in epididymary duct, and estimated by subtracting the total time.
Epididymis. Author: Shahab Shahid MBBS • Reviewer: Uruj Zehra MBBS, MPhil, PhD • Last reviewed: J The epididymis is an essential component of the male reproductive is a site of sperm storage and maturation until the time of their discharge to the ductus deferens or vas deferens.
In this article we aim to cover the embryology, anatomy. Sperm morphology is just one thing we assess in a semen analysis. We also look at semen volume, pH, the number of sperm in a sample (concentration), how fast the sperm are swimming (motility) and if the sperm is clumping together (usually due to sperm-producing antibodies after trauma involving the testicles or certain illnesses).
Abstract. In mammals, sperm are produced in the testes to attain (a) the cellular morphology for swimming actively up to the site of fertilization and (b) the haploid nucleus to fuse with that of ova for transferring the paternal genetic information. This page introduces spermatogenesis the development of spermatozoa, the male haploid gamete cell.
In humans at puberty, spermatozoa are produced by spermatogonia meiosis in the seminiferous tubules of the testis (male gonad).
A second process of spermiogenesis leads to change in cellular organisation and shape before release into the central lumen of the. Background. European bison is the largest mammal in Europe with the population of approximately individuals.
However, there is no report of post-mortem spermatozoa collection and cryopreservation from this species and the aim of this study was to test if the epididymal spermatozoa collected post-mortem from European bison are suitable for.
Objectives To investigate the feasibility of percutaneous epididymal sperm aspiration in dogs and whether it might provide a population of epididymal spermatozoa similar to. Storing cauda epididymal spermatozoa in seminal plasma or in defined media at 1 x 10(9) spermatozoa/ml for 24 h at 4 degrees C caused swelling of the apical ridge on motile spermatozoa (SAR.
An important part of any breeding soundness exam is an evaluation of sperm morphology. In the most fundamental case, the size and shape of the head, midpiece and tail are examined. Additional information can be gained by evaluating integrity of the acrosome and sperm membranes. Sperm from different species vary in size and shape.
9 epididymal duct. The corpus connects the caput with the cauda, which continues distally in the vas deferens and represents the site of storage of mature spermatozoa (Robaire et al., ).
In the mammalian epididymis, substantial changes of spermatozoa occur. Roussel JD, Stallcup OT, Austin CR. Selective phagocytosis of spermatozoa in the epididymis of bulls, rabits, and monkeys.
Fertil Steril ;18(4)“Examination of histologic sections of epididymes revealed the presence of many macrophages in the lumen of all regions, and it was often possible to discern parts of engulfed spermatozoa within the .Normally, sperm were accumulated in the ductal lumen of the caput and cauda epididymis (Fig.
4A and B). The epithelium of the epididymal duct consists of two cell types: principal cells, which are columnar with stereocilia on the free surface, and basal cells, which are oval or conical cells with sparse cytoplasm (Fig.
4C and D).To determine the effect of an altered epididymal milieu on Esr1KO sperm, we assayed sperm morphology in the different regions of the epididymis. Sperm recovered from the epididymis exhibited abnormal flagellar coiling and increased incidence of spontaneous acrosome reactions, both of which are consistent with exposure to abnormal epididymal fluid.