Presence of a sexually active goat buck enhances ovulation occurrence in seasonally anestrous does after ovulation and luteolysis induction in hormonally-treated goats in seasonal anestrus.
Anim Reprod Sci
; 211: 106209, 2019 Dec.
Article
in En
| MEDLINE
| ID: mdl-31785631
ABSTRACT
In seasonally anestrous goat does, ovulations can be induced by combining a treatment regimen including progestagen, eCG and prostaglandins. Nonetheless, ovulations occur only once and then does return to a seasonally anestrous state. This study was performed to determine whether the presence of a sexually active buck can stimulate a second ovulation after induced luteolysis using prostaglandins following the first ovulation. Three groups of seasonally anestrous does were treated to induce ovulations using an intra-vaginally inserted sponge containing a progestin combined with eCG and prostaglandin administrations. Goats that had ovulations were treated with a prostaglandin 11 days after progestin sponge removal. After the prostaglandin injection, does continued to be isolated from bucks (nâ¯=â¯8), were penned with a control buck (nâ¯=â¯9), or were penned with a sexually active buck (nâ¯=â¯10). The proportion of goats having ovulations after imposing the ovulation-induction protocol was greater than 80% and did not differ among treatment groups (Pâ¯>⯠0.05). The proportion of does having ovulations after injecting prostaglandins was greater when does were penned with a sexually active buck (8/10) than does penned with a control buck (0/9) or that were isolated from bucks (0/8; Pâ¯<â¯0.05). It is concluded that in seasonally anestrous goat does induced to have ovulations using a hormonal treatment regimen, the presence of a sexually active buck can induce a second ovulation when there is an induced luteolysis.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ovulation
/
Seasons
/
Goats
/
Prostaglandins
/
Flurogestone Acetate
/
Chorionic Gonadotropin
Type of study:
Guideline
Limits:
Animals
Language:
En
Journal:
Anim Reprod Sci
Year:
2019
Document type:
Article
Affiliation country:
Mexico