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OJVRTM
Online Journal of Veterinary
Research©
Volume
23 (8):782-785, 2019.
Effect of GnRH and serum estradiol on reproduction in buffaloes
with
or without retained fetal membranes.
Abdulamir
Ali Alzahid1, Enas Ali Al–Yassiri2,
Talib Mosa Alhamedawi2
Department(s) of Surgery
and Obstetrics, College(s) of Veterinary Medicine. 1University of
Kerbala,
2University of Baghdad, Iraq.
ABSTRACT
Ali Alzahid A, Ali
Al–Yassiri E, Mosa Alhamedawi T., Effect of GnRH and serum estradiol on
reproduction in buffaloes with or without retained fetal membranes, Onl J Vet Res., 23 (8):782-, 2019. Blood samples for
estradiol were taken from twenty 3rd trimester pregnant buffalo 1-2
weeks before partus. After parturition, those with or
without retained fetal membranes (RFM) were injected 0.021mg (5ml) Gonadotropic
releasing hormone (GnRH) IM. We then monitored days to estrus, open days, service/conception
and pregnancy rates. We found ~38% lower serum estradiol (22.8±4.64 pg/ml) in buffalo with RFM compared with those that subsequently
expelled the fetal membranes (37.1+3.82 pg/ml;
P < 0.01). Buffalo with RFM took ~42% (28.56±4.74 days:P < 0.01) longer to reach estrus compared with
those without RFM. Our results suggested that to conceive, buffalo with
retained membranes required ~29% more servicing by bulls (P < 0.01) than
those without RFM. We also found ~26% more (P < 0.01) open days in those
with RFM but no effect on pregnancy rates.
Key Words- Buffaloes, Retained
fetal membrane, Estradiol, GnRH, reproduction.
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