Comparison between the effect of hCG and GnRH analogue (buserelin) treatment post laparoscopic insemination on reproductive performance of ewes

2014 ◽  
Author(s):  
Ayman Abdel-Aziz Swelum ◽  
Abdullah N Al-Owaimer ◽  
Mohamed A Abouheif
Keyword(s):  
Reproductive Performance ◽  
Gnrh Analogue ◽  
Buserelin Treatment

Long-Term Results of GnRH Analogue (Buserelin) Treatment in Girls with Central Precocious Puberty

1985 ◽  
Vol 74 (6) ◽  
pp. 945-949 ◽  
Author(s):  
R. BRAUNER ◽  
E. THIBAUD ◽  
P. BISCHOF ◽  
PC. SIZONENKO ◽  
R. RAPPAPORT
Keyword(s):  
Precocious Puberty ◽  
Central Precocious Puberty ◽  
Long Term Results ◽  
Gnrh Analogue ◽  
Buserelin Treatment

Effect of post-mating GnRH analogue (buserelin) treatment on PGF2α release in ewes and ewe lambs

2006 ◽  
Vol 95 (1-2) ◽  
pp. 107-115 ◽  
Author(s):  
T.H. Khan ◽  
N.F.G. Beck ◽  
G.E. Mann ◽  
M. Khalid
Keyword(s):  
Gnrh Analogue ◽  
Ewe Lambs ◽  
Buserelin Treatment

scholarly journals Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

2013 ◽  
Vol 80 (8) ◽  
pp. 870-877 ◽  
Author(s):  
Ellen de Jong ◽  
Johannes Kauffold ◽  
Silke Engl ◽  
Jan Jourquin ◽  
Dominiek Maes
Keyword(s):  
Reproductive Performance ◽  
Gnrh Analogue

Reproductive Performance of Doe Rabbits as Affect by GNRH Analogue Injection at Different Post-partum Days

2017 ◽  
Vol 12 (2) ◽  
pp. 103-108 ◽  
Author(s):  
I.T. El-Ratel ◽  
Tork M. Dorra ◽  
M.A. Sheteifa ◽  
Amira M. Mansour
Keyword(s):  
Reproductive Performance ◽  
Post Partum ◽  
Gnrh Analogue

Reproductive Performance of Rabbit does Artificially Inseminated with Semen Supplemented with GnRH Analogue [des-Gly10, D-Ala6]-LH-RH Ethylamide

2016 ◽  
Vol 19 (3) ◽  
pp. 659-661
Author(s):  
P. Gogol
Keyword(s):  
Reproductive Performance ◽  
Ovulation Induction ◽  
The Other ◽  
Induction Treatment ◽  
Control Group ◽  
Synthetic Analogue ◽  
Gnrh Analogue ◽  
Intravaginal Administration ◽  
Group 5 ◽  
Lh Rh

Abstract The aim of the study was to evaluate, the ability of a GnRH synthetic analogue [des-Gly10, D-Ala6]-LH-RH ethylamide to induce ovulation in rabbit does using intravaginal administration. A total of 138 primiparous lactating does were randomly divided into 4 groups that at the time of insemination received following treatments for ovulation induction: 1 μg of buserelin administered intramuscularly (control group); 5 μg of [des-Gly10, D-Ala6]-LH-RH ethylamide added to the semen dose (D5 group); 10 μg of [des-Gly10, D-Ala6]-LH-RH ethylamide added to the semen dose (D10 group); 15 μg of [des-Gly10, D-Ala6]-LH-RH ethylamide added to the semen dose (D15 group). Kindling rates were 68.8% in D10 and 66.7% in D15 groups and were comparable to that obtained in the control group (72.2%). The kindling rate in group D5 (29.4%) was significantly lower than those recorded in the other groups. The number of live born kits was not significantly affected by the ovulation induction treatment. The results of this study show that [des-Gly10, D-Ala6]-LH-RH ethylamide added directly into the semen dose can effectively stimulate ovulation in rabbits. The dose of 10 μg of [des-Gly10, D-Ala6]-LH-RH ethylamide per doe was sufficient to produce results comparable to those obtained by intramuscular administration of buserelin.

77 USE OF SEMINAL PLASMA TO IMPROVE REPRODUCTIVE PERFORMANCE IN ALPACAS (VICUGNA PACOS) FOLLOWING NATURAL MOUNTING

2016 ◽  
Vol 28 (2) ◽  
pp. 168
Author(s):  
W. Huanca ◽  
J. Turin ◽  
C. Mamani ◽  
R. Sanchez ◽  
W. F. Huanca ◽  
...  
Keyword(s):  
Seminal Plasma ◽  
Reproductive Performance ◽  
Control Experiment ◽  
Conception Rate ◽  
Gnrh Analogue ◽  
Dominant Follicle ◽  
Linear Transducer ◽  
Vicugna Pacos ◽  
Buserelin Acetate ◽  
Natural Mating

Alpacas are classified as induced ovulators, and an external stimulus is required for the occurrence of ovulation. The seminal plasma (SP) of camelids contains a protein identified as β nerve growth factor with the capacity to induce ovulation and corpus luteum formation. Alpacas have a poor reproductive efficiency and high embryo mortality rate. A study was designed to evaluate the use of SP to improve reproductive performance post natural mating (Exp. 1) and with different mounting time (MT; Exp. 2). Experiment 1: Nonpregnant alpacas (n = 117) exhibiting a dominant follicle = 7 mm, detected by transrectal ultrasonography, were bred by natural mating and then assigned randomly to 1 of 3 treatments: T1 (n = 40), 1 mL of SP IM; T2 (n = 39), 1 mL of GnRH analogue (0.0042 mg of buserelin acetate), IM; and T3 (n = 38), control. Experiment 2: Nonpregnant alpacas (n = 180) exhibiting a follicle = 7 mm were assigned randomly to the following treatments: T1 (n = 30): MT 5 min; T2 (n = 30): MT 5 min + 1 mL of SP; T3 (n = 30): MT 10 min; T4 (n = 30): MT 10 min + 1 mL of SP; T5 (n = 30): MT > 15 min; T6 (n = 30): MT > 15 min + 1 mL of SP. The same male was used for mating females in T1 and T2, T3 and T4, and T5 and T6, respectively. Animals were evaluated by ultrasound with an Aloka SSD 500 (Aloka, Tokyo, Japan) and 5.0-MHz linear transducer on Day 25 for pregnancy diagnosis. In Exp. 1 the conception rate was 67.5, 51.3, and 55.3% for T1, T2, and T3, respectively (P > 0.05). In Exp. 2 the conception rate was 46.2, 67.9, 57.1, 73.3, 61.8, and 72.7% for T1, T2, T3, T4, T5, and T6 (P < 0.05) and was significantly different between T1 v. T2 and T3 v. T4. The results suggest that the use of SP could be one method to improve reproductive performance in alpacas. Research was supported by Project N° 405-PNICP-PIAP-UNMSM.

The effect of GnRH analogue (buserelin) treatment on day 12 post mating on ovarian structure and plasma progesterone and oestradiol concentration in ewes

1996 ◽  
Vol 63 (3) ◽  
pp. 407-412 ◽  
Author(s):  
N. F. G. Beck ◽  
M. Jones ◽  
B. Davies ◽  
G. E. Mann ◽  
A. R. Peters
Keyword(s):  
Ovarian Function ◽  
Post Treatment ◽  
Control Group ◽  
Corpora Lutea ◽  
Gnrh Analogue ◽  
Plasma Progesterone ◽  
Group 4 ◽  
Buserelin Treatment ◽  
Group 3 ◽  
Ovarian Structure

AbstractAn investigation was conducted into the effect of buserelin treatment on day 12 post mating on ovarian function and plasma progesterone and oestradiol-17 ji concentration in ewes. Changes in ovarian structures were determined, at laparoscopy or after slaughter, 48 h after treatment in 38 control and 41 ewes given an injection of 4 jig buserelin on day 12 post mating (day 0 = day of oestrus). Ovulation rate was higher in buserelin treated (2·76) than in control (1·87) ewes (P < 0·05). Moreover, 41 of the 113 corpora lutea observed in the buserelin group were the result of ovulations that had occurred within 48 h post treatment, compared with two of 71 in the controls (P < 0·05). Blood samples were collected from 10 ewes in each treatment group for hormone analysis. Mean progesterone concentrations tended to be higher, in samples collected from 2 to 6h post treatment, in the buserelin group (4·31 (s.e. 1·32) p.g/1) compared with the control group (3·71 (s.e. 1·44) fig/l. Furthermore, overall mean oestradiol concentrations were lower, during days 13, 14 and 15 post mating, in buserelin treated (0·72 (s.e. 0·26) ngfl) than in control (0·94 (s.e. 0·50) ng/l) ewes (P < 0·05). The results of this study indicate that buserelin treatment on day 12 post mating changes ovarian function.

The effect of GnRH agonist (buserelin) treatment on day 12 post mating on the reproductive performance of ewes

1994 ◽  
Vol 58 (2) ◽  
pp. 243-247 ◽  
Author(s):  
N. F. G. Beck ◽  
A. R. Peters ◽  
S. P. Williams
Keyword(s):  
Litter Size ◽  
Gnrh Agonist ◽  
Reproductive Performance ◽  
Rate Control ◽  
Size Control ◽  
Corpora Lutea ◽  
Gestation Length ◽  
Embryo Survival ◽  
Ewe Lamb ◽  
Buserelin Treatment

AbstractAn investigation was conducted to determine the effects of treatment with the GnRH agonist buserelin on day 12 post mating on the reproductive performance of ewes. There was a non-significant (P > 0·05) increase in nonreturn rate (control 0·76 v. buserelin 0·83) and litter size (control 1·51 v. buserelin 1·77) in three flocks. However, there was a significant (P < 0·05) increase in the number of twin lambs born (control 20 v. buserelin 40) and litter size (control 1·44 v. buserelin 1·68) in the yearling flock. There was no effect of buserelin on oestrous cycle length, although there was a tendency for treated animals to have a longer gestation length and heavier lambs. In a ewe lamb flock there was no effect of buserelin on non-return rate or litter size assessed post slaughter on day 31 of pregnancy. However, ovulation rate tended to be greater in the treated animals, which suggests that buserelin may have induced the formation of accessory corpora lutea. These results indicate that buserelin treatment improves embryo survival and that this effect is particularly evident in yearling ewes.

The effect of treatment with a gonadotrophin releasing hormone on the fertility of beef cows

1996 ◽  
Vol 1996 ◽  
pp. 67-67
Author(s):  
Duncan Pullar ◽  
Anthony Wrathall
Keyword(s):  
Beef Cows ◽  
Dairy Herds ◽  
Gnrh Analogue ◽  
Reproductive Disorders ◽  
Releasing Hormone ◽  
History Of ◽  
Buserelin Treatment ◽  
Effect Of Treatment ◽  
Gonadotrophin Releasing Hormone ◽  
Friesian Cows

Use of the gonadotrophin releasing hormone (GnRH) analogue, buserelin has been shown to be effective reducing embryo mortality, by a luteoprotective mechanism, in reproductively normal dairy cows. Drew and Peters, (1991) increased mean pregnancy rates to AI from 53.4 to 65.4% in dairy herds by a buserelin treatment, given 10-12 post service. The objective of this experiment was to determine whether buserelin can also have a beneficial effect on pregnancy rate, in normal and known problem suckler cows.Seventy-eight Hereford x Friesian cows (from 0-4 parities) were used. Forty were considered reproductively normal ('normal' cows) having calved each year from their first season and currently with a 10 week old calf at-foot; while 38 had a history of reproductive disorders ('suspect' cows) and had not calved in the previous 15 months (May 1994 to July 1995).

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