List of works - Rodolfo Ungerfeld

Administration of a single dose of a PGF2α analogue (dinoprost) before sexual tests did not improve ram's sexual behaviour

scientific article published on 15 September 2020

Administration of cloprostenol and oxytocin before electroejaculation in goat bucks reduces the needed amount of electrical stimulation without affecting seminal quality

scientific article published on 28 October 2017

Adult and yearling pampas deer stags (Ozotoceros bezoarticus) display mild reproductive seasonal patterns with maximum values in autumn

scientific article published on 29 June 2020

Anatomical study of the gastrointestinal tract in free-living axis deer (Axis axis).

scientific article published on 5 March 2014

Antler velvet is thicker in adult than in yearling pampas deer (Ozotoceros bezoarticus): a histological study.

scientific article published on 4 November 2016

Arterial Vascularization of the Gastrointestinal Tract of the Pampas Deer (Ozotoceros bezoarticus, Linnaeus, 1758).

scientific article

Asymmetrical size and functionality of the pampas deer (Ozotoceros bezoarticus) testes: Right testis is bigger but left testis is more efficient in spermatogenesis.

scientific article published on 7 September 2017

Behavioral and physiological changes in early-weaned multiparous and primiparous beef cows

scientific article published on 01 June 2011

Behavioural response of grazing lambs to changes associated with feeding and separation from their mothers at weaning

scientific article published on 14 August 2013

Changes in the aerobic vaginal bacterial mucous load after treatment with intravaginal sponges in anoestrous ewes: effect of medroxiprogesterone acetate and antibiotic treatment use

scientific article published on 01 April 2011

Chronic use of a GnRH agonist (deslorelin) or immunization against GnRH: effects on testicular function and sperm quality of bucks

scientific article published on 14 September 2019

Combination of the ram effect with PGF2α estrous synchronization treatments in ewes during the breeding season

scientific article published on 18 February 2011

Competition Between Different Social Ranked Rams has Similar Effects on Testosterone and Sexual Behaviour Throughout the Year.

scientific article published on 22 October 2015

Competition for oestrous ewes between rams reared by their mothers or artificially reared: Effects on sexual behaviour and testosterone and cortisol serum concentrations.

scientific article published on 8 June 2017

Continuous contact with females in estrus throughout the year enhances testicular activity and improves seminal traits of male goats.

scientific article

Daily administration of a GnRH analogue enhances sperm quality in bucks during the non-breeding season

scientific article published on 19 November 2018

Early pregnancy diagnosis in ewes by subjective assessment of luteal vascularisation using colour Doppler ultrasonography.

scientific article

Effect of different hormonal combinations on follicular wave emergence and superovulatory response in sheep

scientific article published on 26 July 2017

Ejaculation does not contribute to the stress response to electroejaculation in sheep.

scientific article published on 25 January 2017

Environmental factors and interval from the introduction of rams to estrus in postpartum Saint Croix sheep

scientific article published on 12 January 2011

Equine Chorionic Gonadotropin (eCG) improves bucks' semen quality during the nonbreeding season

scientific article published on 08 June 2018

Equine chorionic gonadotrophin administration to rams improves their effectiveness to stimulate anoestrous ewes (the "ram effect")

scientific article published on 11 July 2014

Gross Anatomy of Pampas Deer (Ozotoceros bezoarticus, Linnaeus 1758) Mouth and Pharynx.

scientific article published on 17 October 2016

Grouping previously unknown bucks is a stressor with negative effects on reproduction.

scientific article published on 3 December 2014

Growing without a mother results in poorer sexual behaviour in adult rams

scientific article published on 11 July 2017

Heart rate patterns during courtship and mating in rams and in estrous and nonestrous ewes ().

scientific article published in February 2016

Histology of lamb epididymal development

scientific article published on 01 December 2007

Homosexual behavior in male goats is more frequent during breeding season and in bucks isolated from females

scientific article published on 2 May 2014

Hormonal protocols for early resynchronization of ovulation in ewes: The use of progestagens, eCG, and inclusion of early pregnancy diagnosis with color Doppler ultrasound

scientific article published on 30 April 2019

Influence of seasonality and stimulus of oestrous does in bucks' aggressiveness.

scientific article

Intravaginal sponges to synchronize estrus decrease sexual attractiveness in ewes

scientific article published on 25 August 2012

Low pasture allowance until late gestation in ewes: behavioural and physiological changes in ewes and lambs from lambing to weaning.

scientific article published on 13 July 2016

Maternal nutritional restriction during gestation impacts differently on offspring muscular and elastic arteries and is associated with increased carotid resistance and ventricular afterload in maturity

scientific article published on 29 May 2019

Melanin concentrating hormone (MCH) in the cerebrospinal fluid of ewes during spontaneous oestrous cycles and ram effect induced follicular phases

scientific article published on 13 October 2011

Minimising the stress of weaning of beef calves: a review. ⬇️

scientific article published on 13 May 2011

Minimizing cows' stress when calves were early weaned using the two-step method with nose flaps.

scientific article

Observations on the macroscopic anatomy of the intestinal tract and its mesenteric folds in the pampas deer (Ozotoceros bezoarticus, Linnaeus 1758)

scientific article

Ovarian response to gonadotropin treatment initiated relative to wave emergence in ultrasonographically monitored ewes

scientific article published on 01 June 1997

Oxytocin administration before sperm collection by transrectal ultrasonic-guided massage of the accessory sex glands in mouflons and bucks

scientific article published on 3 August 2016

Pampas deer (Ozotoceros bezoarticus) courtship and mating behavior.

scientific article

Permanent contact with females increases testosterone and improves fresh semen traits in pampas deer (Ozotoceros bezoarticus) males.

scientific article

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).

scientific article

Positive effects of biostimulation on luteinizing hormone concentration and follicular development in anestrous beef heifers

scientific article published on 01 March 2016

Progesterone administration reduces the behavioural and physiological responses of ewes to abrupt weaning of lambs.

scientific article published on 19 April 2013

Progesterone pretreatment increases the stress response to social isolation in ewes

scientific article published on 6 January 2016

Ram effect: adult rams induce a greater reproductive response in anestrous ewes than yearling rams

scientific article published on 16 December 2006

Rams prefer tailed than docked ewes as sexual partners

scientific article published on 13 August 2018

Relationship between male-male and male-female sexual behavior in 5-6-month-old male lambs.

scientific article published on 20 September 2006

Reproductive and sexual behaviour development of dam or artificially reared male lambs

scientific article published on 03 April 2015

Reproductive biology of the pampas deer (Ozotoceros bezoarticus): a review

scientific article

Reproductive development of male goat kids reared with or without permanent contact with adult females until 10 months of age.

scientific article published on 6 September 2014

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

scientific article published on 01 May 2006

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.

scientific article published in February 2008

Seasonality in Saint Croix male lamb reproductive development in northern Mexico

scientific article published on 04 December 2018

Sedation or anaesthesia decrease the stress response to electroejaculation and improve the quality of the collected semen in goat bucks

scientific article published on 01 December 2018

Sexual behavior of subordinate, but not dominant, rams increases following observed sexual activity

scientific article published on 25 February 2019

Sexual performance and stress response of previously unknown rams after grouping them in dyads

scientific article published on 16 August 2012

Sexual stimulation as a luteolytic inductor in beef heifers

scientific article published on 11 April 2019

Slow and ultra-rapid freezing protocols for cryopreserving mouflon (Ovis musimon) and fallow deer (Dama dama) epididymal sperm

scientific article published on 08 March 2018

Social dominance affects intake rate and behavioral time budget in pre-pubertal dairy heifers allocated in continuous competitive situations

article

Social dominance affects the development of sexual behaviour but not semen output in yearling bucks

scientific article published on 17 January 2018

Social dominance in prepubertal dairy heifers allocated in continuous competitive dyads: Effects on body growth, metabolic status, and reproductive development

scientific article published on 11 January 2017

Social rank and reproductive performance of pampas deer females (Ozotoceros bezoarticus, Linnaeus, 1758).

scientific article published on 13 March 2014

Social rank during pre-pubertal development and reproductive performance of adult rams.

scientific article published on 20 May 2010

Sperm characterization and identification of sperm sub-populations in ejaculates from pampas deer (Ozotoceros bezoarticus).

scientific article published on 23 July 2014

Sperm collection by electroejaculation in small ruminants: A review on welfare problems and alternative techniques

scientific article published on 29 March 2019

Sperm collection by transrectal ultrasound-guided massage of the accessory sex glands is less stressful than electroejaculation without altering sperm characteristics in conscious goat bucks

scientific article

Superovulatory response in anestrous ewes is affected by the presence of a large follicle

scientific article published on 01 January 1995

Testicular fluid content and scrotal surface temperature increase with rams' sexual activity

scientific article published on 12 October 2011

Testicular fluid content evaluated by ultrasound image computer-assisted analysis increases with small-dose multiple GnRH injections in rams.

scientific article

The 'male effect' in sheep and goats--revisiting the dogmas.

scientific article published on June 2009

The ovulatory response of anoestrous goats exposed to the male effect in the subtropics is unrelated to their follicular diameter at male exposure.

scientific article published in December 2010

The phase of the estrous cycle modifies the endocrine, metabolic and behavior rhythms in ewes

scientific article published on 13 March 2019

The tail in tropical hair ewes (Ovis aries) that are in estrus is used as a proceptive signal and favors ram' copulation

scientific article published on 16 May 2018

Treatment of male goats with equine chorionic gonadotrophin during the non-breeding season does not affect their sperm characteristics during the subsequent breeding season

scientific article published on 15 July 2019

Treatment with an equine chorionic gonadotrophin single dose restored spermatozoa production in an azoospermic pampas deer (Ozotoceros bezoarticus) male: a case report.

scientific article

Uterine involution and ovarian changes during early post partum in autumn-lambing Corriedale ewes

scientific article published on 01 August 1993

Vaginal biota number is smaller in tailed than docked hair ewes (Ovis aries), but is not affected by copulation

scientific article published on 18 December 2018

Vaginal histological changes after using intravaginal sponges for oestrous synchronization in anoestrous ewes.

scientific article

Vaginal mucus from ewes treated with progestogen sponges affects quality of ram spermatozoa

scientific article published on 3 November 2015

Vocalizations during electroejaculation in anaesthetized adult and young pampas deer (Ozotoceros bezoarticus) males

scientific article

Weekly bull exchange shortens postpartum anestrus in suckled beef cows

scientific article published on 04 March 2008

List of works by Rodolfo Ungerfeld

Administration of a single dose of a PGF2α analogue (dinoprost) before sexual tests did not improve ram's sexual behaviour

Administration of cloprostenol and oxytocin before electroejaculation in goat bucks reduces the needed amount of electrical stimulation without affecting seminal quality

Adult and yearling pampas deer stags (Ozotoceros bezoarticus) display mild reproductive seasonal patterns with maximum values in autumn

Anatomical study of the gastrointestinal tract in free-living axis deer (Axis axis).

Antler velvet is thicker in adult than in yearling pampas deer (Ozotoceros bezoarticus): a histological study.

Arterial Vascularization of the Gastrointestinal Tract of the Pampas Deer (Ozotoceros bezoarticus, Linnaeus, 1758).

Asymmetrical size and functionality of the pampas deer (Ozotoceros bezoarticus) testes: Right testis is bigger but left testis is more efficient in spermatogenesis.

Behavioral and physiological changes in early-weaned multiparous and primiparous beef cows

Behavioural response of grazing lambs to changes associated with feeding and separation from their mothers at weaning

Changes in the aerobic vaginal bacterial mucous load after treatment with intravaginal sponges in anoestrous ewes: effect of medroxiprogesterone acetate and antibiotic treatment use

Chronic use of a GnRH agonist (deslorelin) or immunization against GnRH: effects on testicular function and sperm quality of bucks

Combination of the ram effect with PGF2α estrous synchronization treatments in ewes during the breeding season

Competition Between Different Social Ranked Rams has Similar Effects on Testosterone and Sexual Behaviour Throughout the Year.

Competition for oestrous ewes between rams reared by their mothers or artificially reared: Effects on sexual behaviour and testosterone and cortisol serum concentrations.

Continuous contact with females in estrus throughout the year enhances testicular activity and improves seminal traits of male goats.

Daily administration of a GnRH analogue enhances sperm quality in bucks during the non-breeding season

Early pregnancy diagnosis in ewes by subjective assessment of luteal vascularisation using colour Doppler ultrasonography.

Effect of different hormonal combinations on follicular wave emergence and superovulatory response in sheep

Ejaculation does not contribute to the stress response to electroejaculation in sheep.

Environmental factors and interval from the introduction of rams to estrus in postpartum Saint Croix sheep

Equine Chorionic Gonadotropin (eCG) improves bucks' semen quality during the nonbreeding season

Equine chorionic gonadotrophin administration to rams improves their effectiveness to stimulate anoestrous ewes (the "ram effect")

Gross Anatomy of Pampas Deer (Ozotoceros bezoarticus, Linnaeus 1758) Mouth and Pharynx.

Grouping previously unknown bucks is a stressor with negative effects on reproduction.

Growing without a mother results in poorer sexual behaviour in adult rams

Heart rate patterns during courtship and mating in rams and in estrous and nonestrous ewes ().

Histology of lamb epididymal development

Homosexual behavior in male goats is more frequent during breeding season and in bucks isolated from females

Hormonal protocols for early resynchronization of ovulation in ewes: The use of progestagens, eCG, and inclusion of early pregnancy diagnosis with color Doppler ultrasound

Influence of seasonality and stimulus of oestrous does in bucks' aggressiveness.

Intravaginal sponges to synchronize estrus decrease sexual attractiveness in ewes

Low pasture allowance until late gestation in ewes: behavioural and physiological changes in ewes and lambs from lambing to weaning.

Maternal nutritional restriction during gestation impacts differently on offspring muscular and elastic arteries and is associated with increased carotid resistance and ventricular afterload in maturity

Melanin concentrating hormone (MCH) in the cerebrospinal fluid of ewes during spontaneous oestrous cycles and ram effect induced follicular phases

Minimising the stress of weaning of beef calves: a review. ⬇️

Minimizing cows' stress when calves were early weaned using the two-step method with nose flaps.

Observations on the macroscopic anatomy of the intestinal tract and its mesenteric folds in the pampas deer (Ozotoceros bezoarticus, Linnaeus 1758)

Ovarian response to gonadotropin treatment initiated relative to wave emergence in ultrasonographically monitored ewes

Oxytocin administration before sperm collection by transrectal ultrasonic-guided massage of the accessory sex glands in mouflons and bucks

Pampas deer (Ozotoceros bezoarticus) courtship and mating behavior.

Permanent contact with females increases testosterone and improves fresh semen traits in pampas deer (Ozotoceros bezoarticus) males.

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).

Positive effects of biostimulation on luteinizing hormone concentration and follicular development in anestrous beef heifers

Progesterone administration reduces the behavioural and physiological responses of ewes to abrupt weaning of lambs.

Progesterone pretreatment increases the stress response to social isolation in ewes

Ram effect: adult rams induce a greater reproductive response in anestrous ewes than yearling rams

Rams prefer tailed than docked ewes as sexual partners

Relationship between male-male and male-female sexual behavior in 5-6-month-old male lambs.

Reproductive and sexual behaviour development of dam or artificially reared male lambs

Reproductive biology of the pampas deer (Ozotoceros bezoarticus): a review

Reproductive development of male goat kids reared with or without permanent contact with adult females until 10 months of age.

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

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.

Seasonality in Saint Croix male lamb reproductive development in northern Mexico

Sedation or anaesthesia decrease the stress response to electroejaculation and improve the quality of the collected semen in goat bucks

Sexual behavior of subordinate, but not dominant, rams increases following observed sexual activity

Sexual performance and stress response of previously unknown rams after grouping them in dyads

Sexual stimulation as a luteolytic inductor in beef heifers

Slow and ultra-rapid freezing protocols for cryopreserving mouflon (Ovis musimon) and fallow deer (Dama dama) epididymal sperm

Social dominance affects intake rate and behavioral time budget in pre-pubertal dairy heifers allocated in continuous competitive situations

Social dominance affects the development of sexual behaviour but not semen output in yearling bucks

Social dominance in prepubertal dairy heifers allocated in continuous competitive dyads: Effects on body growth, metabolic status, and reproductive development

Social rank and reproductive performance of pampas deer females (Ozotoceros bezoarticus, Linnaeus, 1758).

Social rank during pre-pubertal development and reproductive performance of adult rams.

Sperm characterization and identification of sperm sub-populations in ejaculates from pampas deer (Ozotoceros bezoarticus).

Sperm collection by electroejaculation in small ruminants: A review on welfare problems and alternative techniques

Sperm collection by transrectal ultrasound-guided massage of the accessory sex glands is less stressful than electroejaculation without altering sperm characteristics in conscious goat bucks

Superovulatory response in anestrous ewes is affected by the presence of a large follicle

Testicular fluid content and scrotal surface temperature increase with rams' sexual activity

Testicular fluid content evaluated by ultrasound image computer-assisted analysis increases with small-dose multiple GnRH injections in rams.

The 'male effect' in sheep and goats--revisiting the dogmas.

The ovulatory response of anoestrous goats exposed to the male effect in the subtropics is unrelated to their follicular diameter at male exposure.

The phase of the estrous cycle modifies the endocrine, metabolic and behavior rhythms in ewes

The tail in tropical hair ewes (Ovis aries) that are in estrus is used as a proceptive signal and favors ram' copulation

Treatment of male goats with equine chorionic gonadotrophin during the non-breeding season does not affect their sperm characteristics during the subsequent breeding season

Treatment with an equine chorionic gonadotrophin single dose restored spermatozoa production in an azoospermic pampas deer (Ozotoceros bezoarticus) male: a case report.

Uterine involution and ovarian changes during early post partum in autumn-lambing Corriedale ewes

Vaginal biota number is smaller in tailed than docked hair ewes (Ovis aries), but is not affected by copulation

Vaginal histological changes after using intravaginal sponges for oestrous synchronization in anoestrous ewes.