Comparison of the effect of ovulation-inducing factor (OIF) in the seminal plasma of llamas, alpacas, and bulls

Theriogenology
Marcelo H RattoGregg P Adams

Abstract

We have recently reported the presence of an ovulation-inducing factor (OIF) in the seminal plasma of llamas and alpacas-species characterized as induced ovulators. The study was designed to test the hypothesis that the seminal plasma of bulls will induce ovulation in llamas, and to compare the ovulation-inducing effect of seminal plasma of conspecific versus hetero-specific males. The seminal plasma of alpacas, a closely related induced ovulator (Lama pacos), and cattle, a distantly related ruminant species (Bos taurus) considered to be spontaneous ovulators, were compared with that of the llama (Lama glama). Ovulation and maximum corpus luteum diameter were compared by ultrasonography among female llamas (n=19 per group) treated intramuscularly with 2 mL of phosphate buffered saline (PBS, negative control) and those treated with 2 mL of seminal plasma of bulls, alpacas, or llamas (conspecific control). The diameter of the preovulatory follicle did not differ among groups at the time of treatment. Bull seminal plasma induced ovulations in 26% (5/19) of llamas compared to 0% (0/19) in PBS group (P<0.001). The proportion of females that ovulated was lower (P<0.01) in bull seminal plasma group compared to the groups treated with ...Continue Reading

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Citations

May 14, 2010·Reproductive Biology and Endocrinology : RB&E·Marcelo H RattoGregg P Adams
Feb 12, 2011·Reproductive Biology and Endocrinology : RB&E·Marcelo H RattoGregg P Adams
Sep 7, 2012·Reproduction, Fertility, and Development·C M Kershaw-YoungW M C Maxwell
Jan 17, 2013·The Veterinary Journal·Robert O Gilbert, Susan S Suarez
Nov 13, 2012·Animal Reproduction Science·Gregg P Adams, Marcelo H Ratto
Jul 10, 2012·Animal Reproduction Science·O A BogleG P Adams
Oct 1, 2011·Theriogenology·P G RebollarC Castellini
Sep 9, 2011·Animal Reproduction Science·M SilvaM H Ratto
May 15, 2010·Animal Reproduction Science·W R Twink Allen
Mar 24, 2009·Animal Reproduction Science·José Luis RiverosGerhard Schuler
Sep 24, 2015·Reproduction in Domestic Animals = Zuchthygiene·M MaranesiC Boiti
Apr 19, 2008·Journal of Chemical Neuroanatomy·Eliana de SouzaJosé Angel Narváez
Oct 21, 2016·Reproduction in Domestic Animals = Zuchthygiene·G P AdamsR A Carrasco
Feb 14, 2018·Biology of Reproduction·Margherita MaranesiMassimo Zerani
Feb 15, 2019·Reproduction : the Official Journal of the Society for the Study of Fertility·Marcelo H RattoGregg P Adams
Jan 31, 2020·Physiological Reviews·John E Schjenken, Sarah A Robertson
Mar 28, 2017·Reviews in the Neurosciences·Ashutosh KumarSankat Mochan
Jul 18, 2017·Frontiers in Veterinary Science·Khalid El AllaliValérie Simonneaux
Dec 18, 2020·Biology of Reproduction·Rodrigo A CarrascoGregg P Adams
Dec 24, 2020·Biology of Reproduction·Michael Lough-StevensMatthew D Dean
May 11, 2021·Integrative and Comparative Biology·Patricia L R BrennanStephen Purdy

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