Human Chorionic Gonadotrophin Treatment for Sexual Immaturity in a Male Ibex (Capra Pyrenaica)
DOI:
https://doi.org/10.17140/VMOJ-2-116Keywords:
Wild goat; Ibex; Testes; hCG; PubertyAbstract
Gonadotrophin deficiency, a condition usually present from birth, can cause delayed puberty
in humans and domestic animals, but this has not been confirmed in wild mountain ruminants.
During the rutting season (December), signs of sexual immaturity were detected in a 2.5 yearold male Iberian ibex (Capra pyrenaica) maintained in captivity. Cryptorchidism of the right
testicle was diagnosed, along with complete adherence of the urethral process to the prepuce.
The animal was treated with five injections of 500 UI hCG, administered intramuscularly over
four weeks (two injections four days apart in the first week, and then one injection per week).
Upon completion of the treatment, the right testicle completed its descent into the scrotum, and
the urethral process detached from the preputial mucous membrane. A semen sample was collected which revealed oligoasthenospermia, confirming hCG to be at least partially effective in
the stimulation of spermatogenesis in ibexes with gonadotrophin deficiency.
References
Santiago-Moreno J, Gómez-Brunet A, Toledano-Díaz A, Puli-do-Pastor A, López-Sebastián A. Social dominance and breeding activity in Spanish ibex (Capra pyrenaica) maintained in cap-tivity. Reprod Fertil Dev. 2007; 19(3): 436-442. doi: 10.1071/ RD06122
Santiago-Moreno J, Castaño C, Toledano-Díaz A, Esteso MC, López-Sebastián A. Cryopreservation of aoudad (Ammotragus lervia sahariensis) sperm obtained by transrectal ultrasound-guided massage of the accessory sex glands and electroejacu-lation. Theriogenology. 2013; 79(2): 383-391. doi: 10.1016/j. theriogenology.2012.10.011
Coloma MA, Toledano-Díaz A, Castaño C, et al. Seasonal variation in reproductive physiological status in the Iberian ibex (Capra pyrenaica) and its relationship with sperm freezability. Theriogenology. 2011; 76: 1695-1705. doi: 10.1016/j.therio-genology.2011.07.001
Smith MC, Sherman DM. Goat Medicine. 2nd ed. Hoboken, NJ, USA: Wiley-Blackwell; 2009.
Belonje PC. Observations on the post-natal development of the penis in Merino ram lambs and wethers: The possible re-lationship to the passage of urinary calculi. J S Afr Vet Assoc. 1965; 36 (3): 381-383. Web site: http://hdl.handle.net/10520/ AJA00382809_3438. Accessed April 9, 2017.
Amann RP, Veeramachaneni DNR.Cryptorchidism in com-mon eutherian mammals. Reproduction. 2007; 133(3): 541-561. doi: 10.1530/REP-06-0272
Karaman IM, Kaya C, Ozturk M, Pirincci N, Yimazgum-rukcu G, Tuken M. The effects of human chorionic gonadotro-phin on normal testicular tissue of rats: Dose-dependence and reversibility. BJU Int. 2006; 97: 1116-1118. doi: 10.1111/j.1464- 410X.2006.06139.x
Oliveira LR, Homma TK, Woloszynek RR, Brito VN, Longui CA. Gonadal response after a single-dose stimulation test with recombinant human chorionic gonadotropin (rhCG) in patients with isolated prepubertal cryptorchidism. Basic Clin Androl. 2016; 26: 13. doi: 10.1186/s12610-016-0039-2
Katongole CB, Naftolin F, Short RV. Relationship between blood levels of luteinizing hormone and testosterone in bulls, and the effects of sexual stimulation. J Endocrinol. 1971; 50: 457-466. doi: 10.1677/joe.0.0500457
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