Full text loading...
Prevention of breeding in the male
/content/chapter/10.22233/9781905319541.chap4
Prevention of breeding in the male
- Author: Michelle Kutzler
- From: BSAVA Manual of Canine and Feline Reproduction and Neonatology
- Item: Chapter 4, pp 34 - 43
- DOI: 10.22233/9781905319541.4
- Copyright: © 2010 British Small Animal Veterinary Association
- Publication Date: January 2010
Abstract
This chapters considers both the medical and surgical approaches to the prevention of breeding in the male cat or dog.
Preview this chapter:
Prevention of breeding in the male, Page 1 of 1
< Previous page | Next page > /docserver/preview/fulltext/10.22233/9781905319541/9781905319541.4-1.gif
/content/chapter/10.22233/9781905319541.chap4
Figures
/content/figure/10.22233/9781905319541.chap4.ch04fig1
4.1
New methods of contraception that inhibit either the production or function of sperm are currently under development. Many potential targets have been identified along the pathway from spermatogonial stem cells to fertilization. A partial list associated with the putative stage of the pathway is shown. (Reproduced from
Blithe (2008)
with permission from Contraception) © 2010 British Small Animal Veterinary Association
10.22233/9781905319541/fig4_1_thumb.gif
10.22233/9781905319541/fig4_1.png
4.1
New methods of contraception that inhibit either the production or function of sperm are currently under development. Many potential targets have been identified along the pathway from spermatogonial stem cells to fertilization. A partial list associated with the putative stage of the pathway is shown. (Reproduced from
Blithe (2008)
with permission from Contraception)
/content/figure/10.22233/9781905319541.chap4.ch04fig2
4.2
Hypothalamic–pituitary–testicular axis. Spermatogenesis requires a high intratesticular concentration of testosterone (T). Addition of a progestogen or a GnRH agonist results in cessation of GnRH production, which inhibits production of LH and FSH. In the absence of gonadotrophins, intratesticular and serum testosterone decline to levels that are insufficient to support spermatogenesis and libido. (Redrawn after
Blithe (2008)
with permission from Contraception) © 2010 British Small Animal Veterinary Association
10.22233/9781905319541/fig4_2_thumb.gif
10.22233/9781905319541/fig4_2.png
4.2
Hypothalamic–pituitary–testicular axis. Spermatogenesis requires a high intratesticular concentration of testosterone (T). Addition of a progestogen or a GnRH agonist results in cessation of GnRH production, which inhibits production of LH and FSH. In the absence of gonadotrophins, intratesticular and serum testosterone decline to levels that are insufficient to support spermatogenesis and libido. (Redrawn after
Blithe (2008)
with permission from Contraception)
/content/figure/10.22233/9781905319541.chap4.ch04fig4
4.4
(a) Marked testicular atrophy was present 6 months after GnRH vaccination of a cat (right) compared to sham-treated cat (left). The scale is in centimetres. (b) Penile spines were still well developed in the sham-treated cat. (c) Penile spines were absent in the GnRH vaccinated cat. (Reproduced from
Levy et al. (2004)
with permission from Theriogenology) © 2010 British Small Animal Veterinary Association
10.22233/9781905319541/fig4_4_thumb.gif
10.22233/9781905319541/fig4_4.png
4.4
(a) Marked testicular atrophy was present 6 months after GnRH vaccination of a cat (right) compared to sham-treated cat (left). The scale is in centimetres. (b) Penile spines were still well developed in the sham-treated cat. (c) Penile spines were absent in the GnRH vaccinated cat. (Reproduced from
Levy et al. (2004)
with permission from Theriogenology)
/content/figure/10.22233/9781905319541.chap4.ch04fig6
4.6
Laparoscopic-assisted cryptorchidectomy. The animal has been tilted slightly to the contralateral side to facilitate visualization of the retained testis. (a) The testis retained in the abdomen is grasped with 5 mm toothed grasping forceps and elevated to the abdominal wall. (b) The testis is exteriorized for ligation and transection of the vascular supply and ductus deferens. (Redrawn after
Miller et al. (2004)
with permission from the Journal of the American Veterinary Medical Association). Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission. © 2010 British Small Animal Veterinary Association
10.22233/9781905319541/fig4_6_thumb.gif
10.22233/9781905319541/fig4_6.png
4.6
Laparoscopic-assisted cryptorchidectomy. The animal has been tilted slightly to the contralateral side to facilitate visualization of the retained testis. (a) The testis retained in the abdomen is grasped with 5 mm toothed grasping forceps and elevated to the abdominal wall. (b) The testis is exteriorized for ligation and transection of the vascular supply and ductus deferens. (Redrawn after
Miller et al. (2004)
with permission from the Journal of the American Veterinary Medical Association). Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.