scholarly journals Temporary Calf Removal and Equine Chorionic Gonadotropin (Ecg) Administration after Progesterone-Based Protocol Improves the Reproductive Performance of Beef Cattle

2013 ◽  
pp. 1-7
Author(s):  
Jose Breda ◽  
Alisson Giacomeli ◽  
Luiz Kozicki ◽  
Marcio Segui ◽  
Romildo Weiss ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Chorionic Gonadotropin ◽  
Reproductive Performance ◽  
Calf Removal ◽  
Equine Chorionic Gonadotropin

scholarly journals Horse Welfare During Equine Chorionic Gonadotropin (eCG) Production

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1053 ◽  
Author(s):  
Xavier Manteca Vilanova ◽  
Nancy De Briyne ◽  
Bonnie Beaver ◽  
Patricia V. Turner
Keyword(s):  
Beef Cattle ◽  
Animal Welfare ◽  
Chorionic Gonadotropin ◽  
Reproductive Performance ◽  
Blood Collection ◽  
Housing Systems ◽  
Equine Chorionic Gonadotropin ◽  
Serious Injuries

Collection of blood from pregnant mares for extraction of equine chorionic gonadotropin (eCG) is a critical but relatively unknown and poorly regulated practice in the countries in which it occurs. Equine chorionic gonadotropin is a hormone that is widely used to enhance reproductive performance and management of dairy and beef cattle, sheep, goats, and pigs kept under intensive housing systems. eCG is extracted from the blood of brood mares between days 40–120 of gestation. Although alternatives have been sought, there is currently no efficacious replacement, natural or synthetic, for eCG. Recently, several animal welfare organizations have voiced concerns over the condition and treatment of pregnant mares kept for eCG production in some countries. Animal welfare issues may arise if mares are bled too frequently or if too much blood is collected at any time. In addition, these mares tend to be managed extensively on pastures with minimal veterinary oversight and they may be poorly desensitized and habituated to handling and other practices. This can lead to serious injuries and even death when mares are brought in for bleeding. This paper reviews the process of blood collection for eCG extraction and provides recommendations for ensuring mare welfare.

scholarly journals The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats

2018 ◽  
Vol 61 (4) ◽  
pp. 459-461 ◽  
Author(s):  
Dehouegnon Jerry Agossou ◽  
Nazan Koluman
Keyword(s):  
Chorionic Gonadotropin ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Prostaglandin F2α ◽  
Live Weight ◽  
Mortality Rates ◽  
Breeding Methods ◽  
Frozen Semen ◽  
Natural Mating ◽  
Equine Chorionic Gonadotropin

Abstract. This study compared the effects of natural mating and artificial insemination using frozen buck semen on reproductive performance in Alpine goats. Sixty reproductive Alpine goats were grouped according to natural mating (n=30) and artificial insemination (n=30) breeding methods. Oestrus was synchronised in experimental goats using a vaginal sponge impregnated with 20 mg of progestogen FGA (fluorogestone acetate) for 11 days. At the time of sponge insertion, 150 µg of prostaglandin F2α (PGF2α) analogue was injected intramuscularly. Forty-eight hours prior to vaginal sponge withdrawal, 500 IU equine chorionic gonadotropin (eCG) was injected into the animals. At the end of synchronisation protocol, goats were fertilised using frozen semen or mated with a well-performing buck (ratio: 1 male to 5 females). The pregnancy (pregnant/synchronised goats) and mortality rates (P<0.05) were higher (93 % vs. 70 %; 2 % vs. 4 %) in the naturally mated goats than the artificially inseminated group. Kids' live weight at birth was similar (3.83±0.23 and 3.15±0.11 kg) in both groups. The oestrus synchronisation followed by natural mating achieved better reproductive performance than the goats artificially inseminated using frozen semen. However, the artificially inseminated animals displayed an acceptable twinning rate.

scholarly journals EFFECT OF KISPEPTIN-10 AS AN ALTERNATIVE TO ECG IN ESTRUS SYNCHRONIZATION PROTOCOL ON IMPROVING THE REPRODUCTIVE PERFORMANCE OF KARADI EWES

2021 ◽  
Vol 52 (3) ◽  
pp. 535-546
Author(s):  
T. A. Abdulkareem ◽  
S. J. Muhammad ◽  
A. N. Yousif
Keyword(s):  
Body Weight ◽  
Chorionic Gonadotropin ◽  
Reproductive Performance ◽  
The Other ◽  
Control Group ◽  
Estrus Synchronization ◽  
Serum Progesterone ◽  
Live Body Weight ◽  
Equine Chorionic Gonadotropin ◽  
Synchronization Protocol

This study was conducted to examine the effect of Kisspeptin-10 as an alternative to equine chorionic gonadotropin (eCG) in estrus- synchronization protocol for improving the reproductive performance of Karadi ewes. Forty adult ewes of 3-7 years old and 65–70 kg live body weight were equally divided into four equal groups. Animals were inserted with a progestagen (60 mg MAP)-impregnated sponges for 13 days as estrus synchronization protocol. Following withdrawal of sponges, first group was served as control (C) and intramuscularly injected with normal saline only. The second group was intramuscularly injected with 250 IU of eCG (eCG), while those of third and fourth groups were intravenously injected with 4 and 8 µg /kg body weight of Kisspeptin-10, referred as Kisspeptin1 and Kisspeptin2 groups respectively. Serum progesterone and LH concentrations did not significantly differ among groups before estrus synchronization protocol and eCG or Kisspeptin treatments. The two Kisspeptin-injected groups attained better (P≤0.01) overall mean estrus (100%), fertility (90%), conception (90 and 100%, respectively), lambing (90%), and twinning (10%) rates with lesser barrenness (10%) as compared with the other groups. Moreover, eCG and Kisspeptin groups exhibited greater (P≤ 0.01) percentage of increasing fecundity (233%) and extra lambs born (0.7) than the control group. In conclusion, treatment of Karadi ewes either with Kisspeptin-10 or eCG hormones enhanced the overall reproductive performance, but did not affect serum progesterone and LH concentrations.

18 DO TEMPORARY CALF REMOVAL AND/OR EQUINE CHORIONIC GONADOTROPIN ADMINISTRATION INCREASE PREGNANCY RATES IN LACTATING NELORE COWS TREATED WITH A PROGESTERONE-RELEASE INTRAVAGINAL DEVICE?

2006 ◽  
Vol 18 (2) ◽  
pp. 117
Author(s):  
V. G. Pinheiro ◽  
A. F. Souza ◽  
M. F. Pegorer ◽  
R. L. Ereno ◽  
C. M. Barros
Keyword(s):  
Pregnancy Rate ◽  
Body Condition ◽  
Chorionic Gonadotropin ◽  
Buenos Aires ◽  
Post Partum ◽  
Hormonal Treatment ◽  
Pregnancy Rates ◽  
Calf Removal ◽  
Equine Chorionic Gonadotropin ◽  
Intravaginal Device

Reports indicate that either temporary calf removal or equine chorionic gonadotropin administration can increase the efficiency (pregnancy rate) of hormonal treatments with progestins during postpartum anestrus. This experiment evaluated effects of TCR and/or eCG administration in a protocol with progesterone that is frequently used for fixed-time artificial insemination (FTAI) in cows during postpartum anestrus. The protocols were tested at three farms in lactating Nelore cows (40 to 70 days post-partum, n = 361) with body condition scores from 2.5 to 3.0 (0- to 5-point scale). At a random stage of the estrous cycle (Day 0), animals received a basic PEPE (progesterone-estrogen-prostaglandin-estrogen) protocol with insertion of an intravaginal device with 1.0 g progesterone (DIB�, Syntex, Buenos Aires, Argentina) and an i.m. injection of 2.5 mg of estradiol benzoate (EB, Estrogin�, Farmavet, S�o Paulo, Brazil). Eight days later (Day 8) cows were treated i.m. with 150 mg D-cloprostenol (PGF2� Prolise�, ARSA S.R.L., Buenos Aires, Argentina), and the DIB was removed. Twenty-four hours after DIB removal, cows received 1.0 mg EB i.m. and 30 to 36 h later all animals were FTAIed without estrus detection. Cows were allocated randomly to four groups: PEPE, PEPE/TCR, PEPE/eCG, and PEPE/TCR/eCG. In Group PEPE/TCR, calves were removed temporarily for 54 h (from DIB removal until FTAI). In Group PEPE/eCG, animals received PEPE treatment plus one dose i.m. of 300 UI eCG (Novormon�, Syntex) following PGF2� administration (Day 8). In Group PEPE/TCR/eCG, animals were treated as in protocol PEPE/TCR plus eCG on D8. All animals were examined by ultrasonography (Aloka SSD 500, 7.5 MHz probe) 10 days before and at the beginning of hormonal treatment in order to detect anestrous cows (absence of corpus lutcum in both exams). Pregnancy diagnosis was performed by ultrasonography 30 days after FTAI. The data were analyzed by logistic regression. The following variables were considered in the model and did not affect pregnancy rates: farms, inseminators, and semen (sire). A total of 75% of the animals were in anestrus (absence of CL) and the pregnancy rates were similar (P > 0.05) among the four groups: PEPE (43/85 = 50.6%), PEPE/TCR (42/98 = 42.9%), PEPE/eCG (41/88 = 46%), and PEPE/TCR/eCG (39/90 = 43.3%). The results indicate that in Nelore cows, in postpartum anestrus and good body condition, TCR and/or eCG administration do not improve the efficiency (pregnancy rate) of the PEPE protocol. This work was supported by FAPESP. V.G.P. and A.F.S. received fellowships from CNPq, Brazil.

Effects of equine chorionic gonadotropin on reproductive performance in anestrous mink

1992 ◽  
Vol 70 (2) ◽  
pp. 499-502 ◽  
Author(s):  
William B. Wehrenberg ◽  
Kenneth J. Kurt ◽  
Reinhold J. Hutz
Keyword(s):  
Chorionic Gonadotropin ◽  
Reproductive Performance ◽  
Equine Chorionic Gonadotropin

Effect of altering the ratio of exogenous gonadotropins on reproductive performance of primiparous sows during the seasonal infertility period

2019 ◽  
Vol 99 (1) ◽  
pp. 202-205 ◽  
Author(s):  
Nutthee Am-in ◽  
Mongkol Techakumphu ◽  
R.N. Kirkwood
Keyword(s):  
Litter Size ◽  
Chorionic Gonadotropin ◽  
Reproductive Performance ◽  
Human Chorionic Gonadotropin ◽  
Estrus Detection ◽  
Estrus Response ◽  
Equine Chorionic Gonadotropin ◽  
To Receive ◽  
Seasonal Infertility

At weaning, 150 primiparous sows were assigned sequentially to receive 400 IU equine chorionic gonadotropin (eCG) with 200 IU human chorionic gonadotropin (hCG) (Gn600), or 400 IU eCG with 400 IU hCG (Gn800), or served as untreated controls. Compared with control and Gn600, the Gn800 had increased estrus response by day 7 and reduced wean-to-estrus intervals (P < 0.05). Compared with controls, both Gn600 and Gn800 increased numbers of large follicles (≥6 mm) at estrus detection (P < 0.05) and the subsequent farrowing rates (P < 0.05). Litter size was unaffected. These data demonstrate the efficacy of supplemental hCG for alleviating effects of seasonal infertility in primiparous sows.

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