©1996-2018. All Rights Reserved. Online
Journal of Veterinary Research . You may not store
these pages in any form except for your own personal use. All other usage or
distribution is illegal under international copyright treaties. Permission to use any of these pages in any other way besides the
before mentioned must be gained in writing from the publisher. This
article is exclusively copyrighted in its entirety to OJVR. This article may be
copied once but may not be, reproduced or re-transmitted without the express
permission of the editors. This journal satisfies the refereeing requirements
(DEST) for the Higher Education Research Data Collection (Australia). Linking:To link to this page or
any pages linking to this page you must link directly to this page only here
rather than put up your own page.
OJVRTM
Online Journal of Veterinary Research©
Volume
18(2):124-131, 2014. Redacted 2017.
Effects of intravaginal progesterone devices on reproductive performance
of Arabian ewes during non-breeding season.
Parvin Sareminejad,
Saleh Tabatabaei, Morteza Mamouei, Khalil Mirzadeh,
Mohammad Boujarpour.
Department of Animal
Science, Ramin University of agriculture and Natural
Resources, Ahwaz, Iran
ABSTRACT
Sareminejad P, Tabatabaei S, Mamouei M, Mirzadeh K, Boujarpour M., Effects of intravaginal progesterone devices
on reproductive performance of Arabian ewes during non-breeding season, Onl J Vet Res., 18(2):124-131, 2014. The effects of intravaginal progesterone
devices on reproductive performance of Arabian ewes during a non-breeding
season is reported. Groups of 21 to 22 Arabian ewes each were given
0.3g medroxy acetate
progesterone (MAP) by intravaginal controlled internal drug release (CIDR) devices
consisting of a nylon core surrounded by a silicone elastomeric impregnated
with P4, or sponges embedded with 60 mg MAP for 14 days. A control group of 19 ewes was not
treated. After the withdrawal of the impregnated devices each ewe was injected
600 IU eCG. Fertile
rams were then mated with 5 each of the treated ewes. No
significant differences
were found in fertility (60% vs. 50%), lambing rates (60% vs.
50%) or litter size (1.0 vs 1.0) with progesterone
treatments. However the estrous response with CIDR (95.2%) and sponge (91%)
treatments was higher compared with controls (5.26%: P<0.05). The mean time
of estrous onset in ewes given CIDR was 34.74h compared with MAP sponge
treatments (45.23h: h P<0.05). The highest incidence of
estrus after removal of the devices in CIDR ewes was 24 to 36h (52.38%) whereas
with sponges occurred at 48 to 60h (40.91%). Gestation length in
ewes treated with sponges was 153.4d which was higher (P<0.05) compared with
those given CIDR (148 day). In treated ewes, progesterone
serum cocentrations rose 3
days after insertion of devices. However, at 1 and 50d after insertion, after
mating there were no differences in serum progesterone levels between
treatments.
KEY-WORDS: Ewes, Progesterone
releasing devices, Reproductive performance.
FULL-TEXT (SUBSCRIPTION OR PURCHASE TITLE $25USD)