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Article: Induction of estrus and fertility using subcutaneous implants in anestrous dairy goats.
- Article from:
- Interciencia
- Article date:
- April 1, 2003
- Author:
CopyrightCOPYRIGHT 2003 Interciencia Association. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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SUMMARY
Forty-four multiparous dairy goats, purebreed and crossbreed of Nubian, Toggenburg, Saanen, La Mancha and French Alpine breeds were used to determine the effect of Norgestomet (3 and 6mg) when used in conjunction with eCG during the anestrous season on the time to onset of estrus, induced estrous, fertility, gestation duration, number of kids per doe and kids birth weights. The animals were assigned randomly to 3 groups; a control group (n=15) without hormonal treatment, another group (n=14) treated with 3mg of Norgestomet (half implant) placed subcutaneously in the ear for 11d; and a third group (n=15) treated with a 6mg Norgestomet implant placed in the ...
<0.05) interval from progestagen removal to estrus than the group treated with 3mg (16.8 [+ or -] 0.76h vs 24.6 [+ or -] 0.8h). Nevertheless, the induced estrus (100 vs 93%) were similar (P><0.10) in the 6mg group (87 vs 57%). No estrous activity was observed in the control group. Gestation length, mean number of kids per doe and mean weight at birth were also similar (P>