Article (Scientific journals)
An echographic study of follicular growth during induced estrus in female Azawak zebu in Niger
Moussa Garba, Mahamadou; Moumouni, Issa; Hamani, Marichatou et al.
2015In Tropical Animal Health and Production, 47, p. 1357-1361
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Keywords :
Bos indicus echography; estrus ovulation; PGF2a progesterone eCG
Abstract :
[en] An echographic study of follicular growth up to ovulation was carried out on 42 lactating Azawakh cows (Bos indicus) after estrus induction by means of a PGF2α or a procedure involving the administration of progesterone vaginally (PRID® DELTA: Progesterone-releasing intravaginal device) for a ten-day period and the injection of a PGF2α and an eCG (400 and 800 IU) on withdrawal. All the animals treated in this way were inseminated 12 and 24 hrs after the onset of estrus. The percentage of estrus induced was not significantly different between the two groups of animals (81%). The average time delay before the onset of estrus was significantly longer after injection of a PGF2α (84.8 ± 26.0 hrs) than after withdrawal of the PRID® (59.2 ± 5.8 hrs). The average duration of the estrus was significantly shorter after its induction by PGF2α (12.6 ± 2.6 hrs) than after induction by progesterone (22.9 ± 2.7 hrs). There was not a significant difference in the interval between the beginning of estrus and ovulation in animals treated by PGF2α (30.3 hrs) and progesterone (28.4 hrs). Injection of a PGF2α was accompanied by a significantly lower rate of gestation than that obtained after treatment of animals by progesterone (31.2% vs 54.5 %). These results confirm the necessity to adapt an insemination policy to hormonal treatment for estrus induction in Bos indicus.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Moussa Garba, Mahamadou 
Moumouni, Issa
Hamani, Marichatou
Hanzen, Christian  ;  Université de Liège > Département clinique des animaux de production (DCP) > Thériogenologie des animaux de production
Language :
English
Title :
An echographic study of follicular growth during induced estrus in female Azawak zebu in Niger
Publication date :
15 July 2015
Journal title :
Tropical Animal Health and Production
ISSN :
0049-4747
eISSN :
1573-7438
Publisher :
Kluwer Academic Publishers, Boston, United States - Massachusetts
Volume :
47
Pages :
1357-1361
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 July 2015

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