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A note on the induction of ovulation in lactating red deer hinds prior to the breeding season

Published online by Cambridge University Press:  02 September 2010

M. W. Fisher ,
P. F. Fennessy  and
G. H. Davis
M. W. Fisher
Affiliation:
MAFTech Invermay Agricultural Centre, Private Bag, Mosgiel, New Zealand
P. F. Fennessy
Affiliation:
MAFTech Invermay Agricultural Centre, Private Bag, Mosgiel, New Zealand
G. H. Davis
Affiliation:
MAFTech Invermay Agricultural Centre, Private Bag, Mosgiel, New Zealand
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Abstract

Methods of inducing ovulation 3 weeks prior to the onset of the breeding season were evaluated in lactating adult red deer. Following 11 days of intravaginal progesterone pre treatment, hinds were either untreated (control), or given 300 i.u. PMSG i.m. or 500 mglh GnRH s.c. by osmotic pump. All hinds were laparoscoped 7 days after progesterone withdrawal to record the presence or absence of a corpus luteum on the ovaries, Laparoscopy showed 0113 control, 11113 PMSG and 8/13 GnRH-treated hinds ovulated indicating that during lactation, both methods of inducing ovulation are similarly effective, However, although these treatments induced ovulation, fertility as assessed from calving records, was poor.

Type
Research Article
Information
Animal Production , Volume 49 , Issue 1 , August 1989 , pp. 134 - 138
Copyright
Copyright © British Society of Animal Science 1989

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