2011 (SBTE) 25th Annual Meeting Proceedings - International ...

Acta Scientiae Veterinariae, 2011. 39(Suppl 1): Abstracts - 25th Annual Meeting SBTE-Brazil. August 2011.
A097 FTAI, FTET AND AI
EFFECT OF TREATMENT
WITH GNRH ANALOGUE AT THE MOMENT OF INSEMINATION ON PREGNANCY RATE IN
PRIMIPAR
AROUS NELORE (
(BOS BOS INDICUS) ) COWS SUBMITED TO A TIMED AI IN THE BRAZILIAN SOUTH PANT
ANTANAL
ANAL
Márcio Ribeiro Silva 1 , José Francisco Massoneto 2 , Daniel Barros Marinho 2 , Isabela Cristina Canavari 3 , Raissa Reverete Raineri 3 & Juliana Correa Borges 3
1
MELHORE ANIMAL, JABOTICABAL, SP, BRAZIL. 2 AGROPECUÁRIA EMA PANTANAL, CORUMBA, MS, BRAZIL. 3 UNESP/FCAV, JABOTICABAL, SP, BRAZIL.
Primiparous cows have lower reproductive efficiency in FTAI programs, especially in environments with limited quality of
forage, as the Pantanal. The objective this experiment was to evaluate the effect of GnRH analogue administration (lecirelin) at the moment of
insemination on pregnancy rate of primiparous. The study was conducted at Piratininga farm, located in the sub-region Paiaguás, Corumbá-MS.
We used 327 Nelore heifers (40 to 60 days postpartum) with 3 (PRI3, n = 132) and 4 years old (PRI4, n = 195), average of 38.5 and 49.7 months
respectively. At unknown stages of the estrous cycle (D0), all cows received 2 mg of estradiol benzoate (RIC-BE ® , Syntex, Argentina) and one
progesterone-releasing intravaginal device. On Day 8, at the time of progesterone device removal, cows received 150µg of d-Cloprostenol
(Prolise ® , ARSA, Argentina), 300U of eCG (5000 Folligon ® , Intervet, Holland) and 1mg of estradiol benzoate. On day 10 was performed
artificial insemination (AI), where 183 cows (GnRH group) received 25µg of lecirelin IM (Gestran Plus ® , ARSA, Argentina). The FTAI was
performed by same technician. Pregnancy diagnosis was performed by ultrasonography (VET ® DP 2200, Mindray, China) 30 days after
FTAI. The body condition scores (BCS, 1-5) were grouped into classes, BCS1 or Thin (BCS = 2.75, n = 199) and BCS2 or Good (BCS> 2.75,
n = 128). Binomial data were analyzed using the GLIMMIX procedure of SAS. Model included pregnancy rate (dependent variable) and
GnRH treatment, age, body condition score and interactions, as independent variables. Error probability less than 5% were considered
significant. There was no effect of administration of GnRH, as well as, age, body condition, and interactions (P > 0.05). The BCS averaged 2.85
± 0.25 and 2.87 ± 0.24 for groups PRI3 and PRI4, respectively. The treatments with progesterone lasted 188.85 ± 3.14 and 188.99 ± 2.95 h,
and the intervals between device removal and AI were 47.97 ± 1.94 and 48.51 ± 2.05 h to PRI3 and PRI4, in order. There were no interactions
among treatment and the explanatory variables. Pregnancy rates of 43.8% (63/144) and 54.1% (99/183) did not differ (P > 0.05) between
control and GnRH. Pregnancy rates between the control group [46.6% (57/109) 41.9% (36/86)] and GnRH [56.8% (42/74), 52.3% (57/109)]
did not differ (P > 0.05) between classes PRI3 and PRI4, in order. For body condition, pregnancy rates of 44.0% (37/84) and 53.0% (61/115)
for BCS1 and 43.3% (26/60) and 55.9% (38 / 68) for BCS2, did not differ (P > 0.05) between control and GnRH, respectively. In conclusion,
although GnRH group have showed superiority percentage, the lecirelin administration on TAI did not increase primiparous pregnancy rate
in Nelore cows at 3 and 4 years in the Brazilian South Pantanal. [Acknowledgments: Agener União Saúde Animal].
Keywords: body condition score, pregnancy rate, reprodutive efficiency.
A098 FTAI, FTET AND AI
EFFICIENCY OF DIFFERENT STIMULI GONADOTR
TROPIN IN RESYNCHRONIZA
ONIZATION NELLORE LACT
CTATING TING COWS SUBMITTED
TED TO
FTAI
Jeff
efferson
erson Tadeu Camp
ampos
1 , Suellen Migue
iguez Gonzále
onzález 2 , Wanessa Blaschi
2 , Thales Ric
icar
ardo Rigo Bar
arreir
eiros
2 & Mar
arcelo Mar
arcondes Seneda
1
1
UNIVERSIDADE ESTADUAL DE LONDRINA, LONDRINA, PR, BRAZIL. 2 UNIVERSIDADE ESTADUAL DO NORTE DO PARANÁ, BANDEIRANTES, PR, BRAZIL.
N
The aim of this study was to evaluate the efficiency of different gonadotropic stimuli resynchronization in Nelore cows. Were
used 814 cows with BCS between 3.0 to 3.5 in the region of Iby Yau, Paraguay. The cows received an intravaginal device containing 1 g of P4
(DIB, Syntex, Argentina) and application of 2 mg of estradiol benzoate (EB) (estradiol benzoate, Syntex, Argentina) IM. Eight days later, the
devices were removed while the application of 1 mg estradiol cypionate (ECP, Pfizer ® , Brazil), 300 UI of eCG (Novormon, Syntex,
Argentina) IM and 125 mg of cloprostenol (cyclase, Syntex, Argentina) IM. All animals were inseminated 48 to 54 h after removal of the DIB.
The cows were divided into five groups. The control group (GC, n = 186) was subjected to heat detection from 18 to 23 days after FTAI. In
the second group (G-R23, n = 159), cows were subjected to 23 days after the resynchronization FTAI with the same protocol mentioned
above, without the application of eCG and the diagnosis of pregnancy by ultrasound (Aloka SSD500, 5 MHz, Japan) on the day of DIB
removal. The last three groups received similar treatment, with the addition of 200UI of eCG (G-R23/200, n = 142), 300 UI of eCG (G-R23/
300, n = 150) simultaneous removal of the DIB or performance the temporary removal of calves from the removal of the DIB and FTAI (G-
R23/RTB, n = 177). All cows were subjected to natural breeding after the second insemination, the proportion of one bull to 25 cows.
Pregnancy diagnosis was performed after 31 days and 30 days after removal of bulls. The results were analyzed by ANOVA (P < 0.05). The
conception rates at FTAI were similar (P > 0.05) [GC=47.8%(89/186); G-R23=54%(86/159); G-R23/200=50.7% (72/142), G-R23/
300=50.6%(76/150) and G-R23/RTB=55.3%(98/177)]. In the resynchronization G-R23/300 G-R23/RTB and had higher conception rates (P