Proceedings of the New Zealand Society of Animal Production.
1988, 48: 71-76
Two trials were carried out in separate years to examine the
effectiveness of buserelin, an analogue of gonadotrophin releasing
hormone, for inducing ovulation in anoestrous red deer hinds.
Anoestrous hinds were pre-treated with intravaginal progesterone
controlled internal drug releasers (CIDR) for 14 d prior to CIDR
withdrawal on 4 March (15 hinds with 1 CIDR each in Trial 1; 16 hinds
with 2 CIDRs each in Trial 2) and injected intramuscularly with
buserelin (7 hinds received; 4µg and 10µg on days 14 and 16 respectively
in Trial 1: 8 hinds received; 2-4 µg per day, days 12-15 and 10 µg on
day 16 in Trial 2). Two weeks after CIDR withdrawal 6 buserelin-treated
hinds in both trials and 1 control hind in Trial 1 had a corpus luteum
present and most had an elevated plasma progesterone level for at least
10 d commencing from 2 to 6 d after withdrawal of the CIDRs. Calving
date was not affected by treatment with buserelin and there was no
evidence that any of the induced ovulations resulted in pregnancy.
Although buserelin induced ovulation in progesterone-primed anoestrous
red deer hinds, further work is required to develop a treatment regime
which will produce successful establishment of pregnancy.
Keywords: NZSAPAB;
ovulation; anoestrous; deer; GnRH analogue
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Last Updated 18-03-1997
