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Induction of Estrus by Administering Progestational Preparations in Anestrous Buffaloes

KrishiKosh

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Title Induction of Estrus by Administering Progestational Preparations in Anestrous Buffaloes
 
Creator Jayachandran, S.
 
Contributor Nanjappan, K.
 
Description Anestrus is one of the major causes of infertility in postpartum buffaloes
which limits early return to postpartum cyclicity thereby affects the reproductive
efficiency. Hence, a study was undertaken to induce estrus in anestrus buffaloes
by administering progesterone in different routes and to use vaginal sponges
impregnated with progesterone as cost effective method to treat anestrus
buffaloes.
A total of 53 numbers (43 true anestrus and 10 regular cycling) of healthy
buffaloes in the reproductive stage of second to fourth parity, with no detectable
abnormalities in their genital tract were included for the study. The experimental
animals were selected from 15 villages of Namakkal, Salem and Karur districts of
Tamilnadu. The selected forty three numbers of true anestrus buffaloes were
divided into four groups namely, group I (controlled internal drug release [CIDR]
for 9 days + GnRH injection at insemination, 10 animals), group II (CIDR for 9
days, 10 animals), group III (progesterone vaginal sponge for 9 days, 13 animals)
and group IV (progesterone depot injection twice at 10 days interval, 10 animals).
Ten numbers of regular cyclic buffaloes (group V) were selected to serve as
control for comparison of biochemical and hormonal profile with anestrus
buffaloes. Blood plasma samples collected before treatment were analysed for
the levels of progesterone, estradiol, thyroxine, triiodothyronine, insulin, total
cholesterol, HDL-cholesterol, glucose, triglycerides, total carotenoids, vitamin E,
fatty acids composition, calcium, phosphorus, copper, cobalt, manganese and
zinc. Plasma progesterone and estradiol levels were also analysed at estrus,
10th and 21st day post estrus.
The CIDR and vaginal sponges were retained in all the animals of
respective groups until removal. Following withdrawal of progesterone, all the
animals in groups I, II and III (100 %) and 90 per cent in group IV were induced
to estrus. The onset of estrus occurred within a range of 42-62, 46-77 and 52-
183 hours in groups I, II and III respectively and in 8-13 days in group IV. The
mean duration of estrus was 23.00, 25.20, 25.04, 24.22 and 25.60 hours in
buffaloes of group I, II, III, IV and V respectively, which did not vary between the
groups. The estrus was intense in 60, 60, 77, 40 and 20 per cent and
intermediate in 40, 40, 23, 40 and 80 per cent of buffaloes for the group I, II, III,
IV and V respectively. An overall conception rate of 60.00, 60.00, 69.23, 55.50
and 50.00 per cent was observed for the groups I to V respectively.
The plasma levels of triiodothyronine, thyroxine and insulin were
significantly (P
 
Date 2016-07-26T13:54:06Z
2016-07-26T13:54:06Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69930
 
Language en
 
Format application/pdf
 
Publisher Tamil Nadu Veterinary and Animal Sciences University