R Ungerfeld

Summary

Publications

  1. doi request reprint Influence of seasonality and stimulus of oestrous does in bucks' aggressiveness
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, 11600, Montevideo, Uruguay Electronic address
    Behav Processes 133:1-5. 2016
  2. doi request reprint Oxytocin administration before sperm collection by transrectal ultrasonic-guided massage of the accessory sex glands in mouflons and bucks
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Anim Reprod Sci 173:13-7. 2016
  3. doi request reprint Physiological responses and characteristics of sperm collected after electroejaculation or transrectal ultrasound-guided massage of the accessory sex glands in anesthetized mouflons (Ovis musimon) and Iberian ibexes (Capra pyrenaica)
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Theriogenology 84:1067-74. 2015
  4. doi request reprint Equine chorionic gonadotrophin administration to rams improves their effectiveness to stimulate anoestrous ewes (the "ram effect")
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, Montevideo 11600, Uruguay Electronic address
    Anim Reprod Sci 149:194-8. 2014
  5. doi request reprint Homosexual behavior in male goats is more frequent during breeding season and in bucks isolated from females
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Horm Behav 65:516-20. 2014
  6. pmc Pampas deer (Ozotoceros bezoarticus) courtship and mating behavior
    Jéssica T Morales-Piñeyrúa
    Departamento de Fisiologia, Facultad de Veterinaria, Montevideo, Uruguay
    Acta Vet Scand 54:60. 2012
  7. doi request reprint Testicular fluid content and scrotal surface temperature increase with rams' sexual activity
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 47:e56-8. 2012
  8. doi request reprint Behavioral and physiological changes in early-weaned multiparous and primiparous beef cows
    R Ungerfeld
    Departamento de Fisiologia, Universidad de la Republica, Montevideo, Uruguay
    Animal 5:1270-5. 2011
  9. doi request reprint Melanin concentrating hormone (MCH) in the cerebrospinal fluid of ewes during spontaneous oestrous cycles and ram effect induced follicular phases
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Peptides 32:2511-3. 2011
  10. pmc Minimising the stress of weaning of beef calves: a review
    Daniel Enríquez
    Laboratório de Etologia Aplicada e Bem Estar Animal, Departamento de Zootecnia e Desenvolvimento Rural, Universidade Federal de Santa Catarina, Florianopolis, SC, Brazil
    Acta Vet Scand 53:28. 2011

Collaborators

Detail Information

Publications49

  1. doi request reprint Influence of seasonality and stimulus of oestrous does in bucks' aggressiveness
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, 11600, Montevideo, Uruguay Electronic address
    Behav Processes 133:1-5. 2016
    ..At least in the conditions of these studies, testosterone concentrations seemed not to be the main influence on the frequency in which aggressive behaviour was displayed...
  2. doi request reprint Oxytocin administration before sperm collection by transrectal ultrasonic-guided massage of the accessory sex glands in mouflons and bucks
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Anim Reprod Sci 173:13-7. 2016
    ..Therefore, its routine inclusion in this species should be considered. ..
  3. doi request reprint Physiological responses and characteristics of sperm collected after electroejaculation or transrectal ultrasound-guided massage of the accessory sex glands in anesthetized mouflons (Ovis musimon) and Iberian ibexes (Capra pyrenaica)
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Theriogenology 84:1067-74. 2015
    ..On the other hand, better fresh sperm may be collected with EE. However, TUMASG provides practical advantages in animal welfare, firstly in these wild species more sensible to stress management and capture myopathy...
  4. doi request reprint Equine chorionic gonadotrophin administration to rams improves their effectiveness to stimulate anoestrous ewes (the "ram effect")
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, Montevideo 11600, Uruguay Electronic address
    Anim Reprod Sci 149:194-8. 2014
    ..It was concluded that treatment of rams with two high doses of eCG before joining them with anestrous ewes, enhanced their ability to induce ewes' cyclic activity (the "ram effect")...
  5. doi request reprint Homosexual behavior in male goats is more frequent during breeding season and in bucks isolated from females
    Rodolfo Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Horm Behav 65:516-20. 2014
    ..Testosterone concentrations appear to be unrelated to homosexual behavior. ..
  6. pmc Pampas deer (Ozotoceros bezoarticus) courtship and mating behavior
    Jéssica T Morales-Piñeyrúa
    Departamento de Fisiologia, Facultad de Veterinaria, Montevideo, Uruguay
    Acta Vet Scand 54:60. 2012
    ..The aim of this study was to characterize the courtship and mating behavior of the pampas deer (Ozotoceros bezoarticus), an endangered species from South America...
  7. doi request reprint Testicular fluid content and scrotal surface temperature increase with rams' sexual activity
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 47:e56-8. 2012
    ..Fluid content remained increased at least for 30 min after the end of the ram-ewe contact. Contact with oestrual ewes triggered an increase in testicular fluid that remained higher after the end of the test...
  8. doi request reprint Behavioral and physiological changes in early-weaned multiparous and primiparous beef cows
    R Ungerfeld
    Departamento de Fisiologia, Universidad de la Republica, Montevideo, Uruguay
    Animal 5:1270-5. 2011
    ..005) in these animals. In conclusion, behavioral changes induced by weaning were greater in multiparous than primiparous cows, indicating a more intense response to cow-calf separation in the multiparous animals...
  9. doi request reprint Melanin concentrating hormone (MCH) in the cerebrospinal fluid of ewes during spontaneous oestrous cycles and ram effect induced follicular phases
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Peptides 32:2511-3. 2011
    ..37 ± 0.15 ng/mL, P=0.02). We concluded that MCH concentration measured in the CSF from ewes increased markedly during the response to the ram effect but not during the natural oestrous cycle of ewes...
  10. pmc Minimising the stress of weaning of beef calves: a review
    Daniel Enríquez
    Laboratório de Etologia Aplicada e Bem Estar Animal, Departamento de Zootecnia e Desenvolvimento Rural, Universidade Federal de Santa Catarina, Florianopolis, SC, Brazil
    Acta Vet Scand 53:28. 2011
    ..This review discusses these issues and assesses the effectiveness of the methods so far proposed for improving the welfare of beef calves during the weaning period...
  11. doi request reprint Combination of the ram effect with PGF2α estrous synchronization treatments in ewes during the breeding season
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Anim Reprod Sci 124:65-8. 2011
    ..The introduction of rams 13 d after a single dose of PGF(2α) did not substitute for the second administration of PGF(2α)...
  12. doi request reprint Testicular fluid content evaluated by ultrasound image computer-assisted analysis increases with small-dose multiple GnRH injections in rams
    R Ungerfeld
    Departamento de Fisiologia, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 46:720-3. 2011
    ..Scrotal surface temperatures were not affected by treatment (p > 0.1). We concluded that multiple small GnRH doses trigger a rapid increase in testicular fluid content not accompanied by changes on scrotal surface temperature...
  13. doi request reprint Social rank during pre-pubertal development and reproductive performance of adult rams
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo, Uruguay
    Anim Reprod Sci 121:101-5. 2010
    ..Conclusions were courtship of rams may differ in line with the social status they had as lambs although there are not clear effects on other sexual behaviors or semen characteristics...
  14. doi request reprint Changes in the aerobic vaginal bacterial mucous load after treatment with intravaginal sponges in anoestrous ewes: effect of medroxiprogesterone acetate and antibiotic treatment use
    M Gatti
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 46:205-8. 2011
    ..We concluded that MAP does not influence the increase in VBN, as the main effect is provoked by the sponge device itself, and local antibiotic treatment resulted in a lower bacterial growth than systemic treatments...
  15. ncbi request reprint Response of Corriedale ewes to the "ram effect" after priming with medroxyprogesterone, fluorogestone, or progesterone in the non-breeding season
    R Ungerfeld
    Department of Physiology, Faculty of Veterinary Science, University of Uruguay, Montevideo, Uruguay
    Acta Vet Scand 40:299-305. 1999
    ..We conclude that MAP, FGA, and CIDR is equally effective in improving the response to the ram effect, and the pattern of oestrus in primed ewes was different than previously reported...
  16. doi request reprint Social rank affects reproductive development in male lambs
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Montevideo, Uruguay
    Anim Reprod Sci 109:161-71. 2008
    ..It remains to be determined if low-ranked lambs can achieve similar development than high-ranked lambs over longer time intervals, or if their maximum developmental capacity is lower than the maximum obtained by high-ranked lambs...
  17. doi request reprint Sexual performance and stress response of previously unknown rams after grouping them in dyads
    L Lacuesta
    Departamento de Fisiologia, Universidad de la Republica, Montevideo, Uruguay
    Anim Reprod Sci 134:158-63. 2012
    ..However, grouping two unfamiliar rams was a stressful event that negatively affected testosterone concentrations but the stress and behavior responses did not differ according to rams' social rank...
  18. doi request reprint Response of anoestrous ewes pre-treated with a single dose of oestradiol-17 beta, or progesterone and oestradiol-17 beta, to the introduction of rams and ewes in oestrus
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    N Z Vet J 56:36-9. 2008
    ..To determine if the fertility following mating at the first induced oestrus in progesterone-primed ewes may be increased with administration of oestradiol-17beta...
  19. pmc Endocrine and ovarian changes in response to the ram effect in medroxyprogesterone acetate-primed Corriedale ewes during the breeding and nonbreeding season
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Acta Vet Scand 46:33-44. 2005
    ....
  20. doi request reprint Behavioural response of grazing lambs to changes associated with feeding and separation from their mothers at weaning
    J P Damián
    Departamento de Biologia Molecular y Celular, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Res Vet Sci 95:913-8. 2013
    ..In addition, the provision of shade when grazing is also important for lambs at the time of weaning...
  21. doi request reprint Intravaginal sponges to synchronize estrus decrease sexual attractiveness in ewes
    M Gatti
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Theriogenology 78:1796-9. 2012
    ..3, respectively). We concluded that the use of intravaginal sponges impregnated with medroxyprogesterone acetate negatively affected ewes' sexual attractiveness, but this decrease was not mitigated by inclusion of a local antibiotic...
  22. doi request reprint No change detected in body weight, scrotal circumference, semen characteristics and sexual behaviour during the development of prepubertal Milchschaf lambs after weekly administration of eCG
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo, Uruguay
    Reprod Domest Anim 43:400-2. 2008
    ..At least in the administration regimens tested, eCG treatment has no effect on prepubertal reproductive development of male lambs...
  23. ncbi request reprint Ram effect: adult rams induce a greater reproductive response in anestrous ewes than yearling rams
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Anim Reprod Sci 103:271-7. 2008
    ..The lesser percentage of pregnancies obtained when yearling rams are used may be explained by differences in mounting behaviors and ejaculation frequency...
  24. doi request reprint Response to biostimulation in peri-puberal beef heifers: influence of male-female proximity and heifer's initial body weight
    C Fiol
    Departamento de Bovinos, Facultad de Veterinaria, Montevideo, Uruguay
    Theriogenology 74:569-75. 2010
    ..0.06 +/- 0.02; P = 0.09). In conclusion, exposure of peri-puberal beef heifers to androgenized steers for 35 d advanced puberty in heavier heifers; an earlier response occurred in heifers with greater proximity to androgenized steers...
  25. ncbi request reprint Reproductive response in suckling Corriedale ewes to the ram effect during the non-breeding season: effect of postpartum condition and the use of medroxyprogesterone priming
    L Silva
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo, 11600, Uruguay
    Trop Anim Health Prod 38:365-9. 2006
    ....
  26. doi request reprint Social dominance and courtship and mating behaviour in rams in non-competitive and competitive pen tests
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la República Uruguay, Montevideo, Uruguay
    Reprod Domest Anim 44:44-7. 2009
    ..However, in competitive tests, although all rams modified their courtship strategies, LR rams were more affected by the presence of dominant rams than HR rams were by the presence of LR rams...
  27. doi request reprint The stress response of frequently electroejaculated rams to electroejaculation: hormonal, physiological, biochemical, haematological and behavioural parameters
    J P Damián
    Area de Bioquímica, Departamento de Biologia Molecular y Celular, Facultad de Veterinaria, Montevideo, Uruguay
    Reprod Domest Anim 46:646-50. 2011
    ..In addition, we described the main parameters of vocalizations and its relation with the moment of EE. The information displayed on the frequent use of EE in the rams should be considered in relation to the welfare implications...
  28. doi request reprint Progesterone administration reduces the behavioural and physiological responses of ewes to abrupt weaning of lambs
    A Freitas-de-Melo
    Departamento de Biologia Molecular y Celular, Universidad de la Republica, Lasplaces 1550, Montevideo 11600, Uruguay
    Animal 7:1367-73. 2013
    ..Progesterone administration reduced the behavioural and physiological responses of ewes to abrupt weaning of lambs, and this effect was not mediated by changes in milk yield and composition, or by lambs' BW. ..
  29. doi request reprint Physiological and biochemical parameters in response to electroejaculation in adult and yearling anesthetized pampas deer (Ozotoceros bezoarticus) males
    F Fumagalli
    Departamento de Biologia Molecular y Celular, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 47:308-12. 2012
    ..Oximetry values were especially low during the procedure. Heart rate increase was greater in adult males, and alkaline phosphatase and creatine kinase concentrations were greater in yearlings...
  30. ncbi request reprint Overview of the response of anoestrous ewes to the ram effect
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Fertil Dev 16:479-90. 2004
    ..Other factors that should be considered before the ram effect is applied, such as the strength of the stimulus and some practical considerations, are also included...
  31. doi request reprint Observations on the macroscopic anatomy of the intestinal tract and its mesenteric folds in the pampas deer (Ozotoceros bezoarticus, Linnaeus 1758)
    W Perez
    Area de Anatomia, Facultad de Veterinaria, Lasplaces 1620, 11600 Montevideo, Uruguay
    Anat Histol Embryol 37:317-21. 2008
    ..When compared with published data from other cervids of different feeding niches, it appears that, among cervids, the ratio of small intestine to the caecocolon length does not reflect the natural diet...
  32. doi request reprint Low pasture allowance until late gestation in ewes: behavioural and physiological changes in ewes and lambs from lambing to weaning
    A Freitas-de-Melo
    1Departamento de Biología Molecular y Celular, Universidad de la Republica, Lasplaces 1620, Montevideo 11600, Uruguay
    Animal 11:285-294. 2017
    ..Lambs' BW was not affected by the feeding received by their mothers...
  33. ncbi request reprint Ewe effect: endocrine and testicular changes in experienced adult and inexperienced young Corriedale rams used for the ram effect
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Anim Reprod Sci 80:251-9. 2004
    ....
  34. ncbi request reprint Relationship between male-male and male-female sexual behavior in 5-6-month-old male lambs
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Anim Reprod Sci 100:385-90. 2007
    ..05). In summary, intensive male-male sexual activity during a short period of male lamb development was observed. There was a positive relationship between sexual behavior of male lambs towards other male lambs and towards estrual ewes...
  35. ncbi request reprint Histology of lamb epididymal development
    A Bielli
    Veterinary Faculty, University of Uruguay, Lasplaces 1550, Monteviedo, Uruguay
    Anat Histol Embryol 36:437-41. 2007
    ..The present results indicate a new way of epididymal development in sheep, which courses from caput to cauda with transient histological regions appearing, varying in location and disappearing during ovine epididymis development...
  36. doi request reprint Arterial Vascularization of the Gastrointestinal Tract of the Pampas Deer (Ozotoceros bezoarticus, Linnaeus, 1758)
    W Perez
    Area de Anatomia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, 11600, Montevideo, Uruguay
    Anat Histol Embryol 45:240-5. 2016
    ..There were no variations in the origin of any of the main branches derived from the coeliac and cranial mesenteric arteries. This species had a basic pattern of arterial distribution similar to small domestic ruminants. ..
  37. ncbi request reprint Minimizing cows' stress when calves were early weaned using the two-step method with nose flaps
    R Ungerfeld
    1Departamento de Fisiología, Facultad de Veterinaria, Montevideo, 11600Uruguay
    Animal 10:1871-1876. 2016
    ....
  38. doi request reprint Gross Anatomy of Pampas Deer (Ozotoceros bezoarticus, Linnaeus 1758) Mouth and Pharynx
    W Perez
    Area de Anatomia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, 11600, Montevideo, Uruguay
    Anat Histol Embryol . 2016
    ..In conclusion and in addition to previous studies of anatomy of the digestive organs in this species, pampas deer may be categorized as belonging to the intermediate type of feeding...
  39. doi request reprint Ejaculation does not contribute to the stress response to electroejaculation in sheep
    S Abril-Sánchez
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim . 2017
    ..Therefore, we concluded that ejaculation does not contribute to the stress response provoked by the EEP. This procedure also provokes muscular damage and probably pain...
  40. doi request reprint Vocalizations during electroejaculation in anaesthetized adult and young pampas deer (Ozotoceros bezoarticus) males
    F Fumagalli
    Clínica Semiológica, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 50:321-6. 2015
    ..The differences in the characteristics of the vocalizations between adult and young males may be related to the anatomic differences in the neck of adult or young males...
  41. doi request reprint Gross anatomy of the female genital organs of the pampas deer (Ozotoceros bezoarticus, Linnaeus 1758)
    W Perez
    Area de Anatomia, Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Anat Histol Embryol 42:168-74. 2013
    ..Our results may be very useful as it provides with information that may be considered for the development of female reproductive biotechnologies...
  42. doi request reprint Weekly bull exchange shortens postpartum anestrus in suckled beef cows
    V Miller
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Theriogenology 69:913-7. 2008
    ..2% vs. 16 of 45, 35.6%; P=0.045). In conclusion, weekly exchange of two pairs of bulls shortened postpartum anestrus in suckled multiparous cows, compared to continuous exposure to a single pair of bulls...
  43. ncbi request reprint Socio-sexual signalling and gonadal function: opportunities for reproductive management in domestic ruminants
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Lasplaces 1550, Montevideo 11600, Uruguay
    Soc Reprod Fertil Suppl 64:207-21. 2007
    ..Although more research is necessary to improve efficacy in some sheep breeds and in postpartum animals, social stimulation emerges as an inexpensive and hormone-free strategy that may be useful for farmers...
  44. doi request reprint Social dominance in prepubertal dairy heifers allocated in continuous competitive dyads: Effects on body growth, metabolic status, and reproductive development
    C Fiol
    Departamento de Bovinos, Instituto de Producción Animal, Facultad de Veterinaria, Universidad de la Republica, Ruta 1 km 42 5, 80100, San Jose, Uruguay Electronic address
    J Dairy Sci . 2017
    ..Dominant heifers had greater body growth and glucose concentrations than subordinate heifers, which may be responsible, at least in part, for the differences on reproductive development between heifers of different social status...
  45. doi request reprint Competition Between Different Social Ranked Rams has Similar Effects on Testosterone and Sexual Behaviour Throughout the Year
    R Ungerfeld
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay
    Reprod Domest Anim 50:1022-7. 2015
    ..This effect was observed consistently throughout the year: high-ranked rams have greater testosterone concentrations than LR rams only during the pre-rut, when they naturally compete to join the groups of ewes...
  46. doi request reprint Anatomical study of the gastrointestinal tract in free-living axis deer (Axis axis)
    W Perez
    Area de Anatomia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1620, 11600, Montevideo, Uruguay
    Anat Histol Embryol 44:43-9. 2015
    ..We concluded that the gastrointestinal system of axis deer reflected similar morphological characteristics of the both types of ruminants: browser and grazer, and we consider it as an intermediate feeder. ..
  47. doi request reprint Sperm characterization and identification of sperm sub-populations in ejaculates from pampas deer (Ozotoceros bezoarticus)
    F Beracochea
    Departamento de Fisiologia, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Anim Reprod Sci 149:224-30. 2014
    ..There were three sperm sub-populations with different morphometric characteristics. The morphometric descriptors are maintained similarly among different collections...
  48. doi request reprint Reproductive development of male goat kids reared with or without permanent contact with adult females until 10 months of age
    L Lacuesta
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Montevideo, Uruguay Electronic address
    Theriogenology 83:139-43. 2015
    ..However, positive effects stopped after goats used as stimulus became pregnant...
  49. doi request reprint Permanent contact with females increases testosterone and improves fresh semen traits in pampas deer (Ozotoceros bezoarticus) males
    M Villagran
    Departamento de Fisiologia, Facultad de Veterinaria, Universidad de la Republica, Lasplaces 1550, Montevideo 11600, Uruguay Electronic address
    Anim Reprod Sci 143:85-90. 2013
    ..04). It is concluded that contact with females stimulates reproductive patterns of male pampas deer, resulting in better fresh semen characteristics before rutting and higher testosterone concentrations during the rut. ..