scholarly journals The Effectiveness of Pharmacological Synchronization of the Estrous Cycle in Hinds (Cervus elaphus L.): A Pilot Field Trial

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2148
Author(s):  
Anna J. Korzekwa ◽  
Władysław Kordan ◽  
Angelika M. Kotlarczyk ◽  
Roland Kozdrowski
Keyword(s):  
Estrous Cycle ◽  
Cervus Elaphus ◽  
Artificial Insemination ◽  
Red Deer ◽  
Endocrine Regulation ◽  
North East ◽  
Group I ◽  
Group Ii ◽  
Equine Chorionic Gonadotropin ◽  
Pharmacological Method

The aim was to estimate the effective pharmacological method of the estrous cycle synchronization by checking the effects of synchronization by measurement of progesterone (P4) and 17-beta estradiol (E2) concentration by RIA and artificial insemination. The experiment was performed at the red deer farm in Rudzie (North-East Poland; 3 year’s old). The herd (N = 14) was kept away from bulls and was divided in two groups of seven animals. In the Group I, CIDR insert (0.3 g of P4) was applicated intravaginally for 12 days; a second insert replaced the first one for the next 12 days, and next 200 IU of equine chorionic gonadotropin (eCG) was injected intramuscularly (Folligon). Estrus was expected 48 h after eCG injection. In the Group II, Chronogest sponge (20 mg of flugestone acetate) was applicated intravaginally and after 7 days replaced with second chronogest sponge for 7 days. After removing the sponge, on the same day eCG was injected and estrus was expected after 48 h. Artificial insemination was provided with frozen-thawed semen twice: 12 and 24 h after expected estrus. The peripheral blood from the jugular vein was collected each time when the inserts or sponge were applicated and 40 days after insemination. The concentration of P4 and E2 in plasma was measured by RIA. The effectiveness of insemination was monitored by pregnancy-associated glycoproteins determination and observed by the number of calves born. Two pregnancies were confirmed in Group I and five in Group II based on PAG concentration. One newborn was observed in Group I and five in Group II. Both methods of synchronization are effective in hinds based on the received profile of steroids. Although the sponge shape in case of chronogest is better comparing with CIDR, which was not completely deposited in the vagina of hind, potentially leads to bacteria inflammation, and it disturbs the rightful endocrine regulation. Moreover, pregnancy rate and hormone responsiveness were better in Group II.

scholarly journals PENGARUH WAKTU INSEMINASI TERHADAP MOTILITAS DAN VIABILITAS SPERMATOZOA PASCAINSEMINASI PADA KAMBING

2006 ◽  
Vol 11 (2) ◽  
pp. 147-150
Author(s):  
Indah Norma Triana
Keyword(s):  
Artificial Insemination ◽  
Egg Yolk ◽  
Cervical Canal ◽  
Group I ◽  
Group Ii

The purpose of this research was to know the effect of insemination time on motility and viability of spermatozoa in egg yolk tris diluter post insemination of goat. In this research 20 female goats was used and divided into two groups and synchronized with PGF2 alfa. If sign of oestrus appeared, then goats in group I, were inseminated with semen from buck diluted with egg yolk tris at the beginning of oestrus and group II inseminated with semen from buck diluted with egg yolk tris at the mid oestrus. Semen was collected from cervical canal of goats at one, two, 3, 6, or 24 hours after insemination for evaluating its motility and viability. Implication of this research is indicate that artificial insemination can be conducted in the early also the mid oestrus of goat.

Artificial insemination of farmed red deer (Cervus elaphus)

1990 ◽  
Vol 51 (3) ◽  
pp. 613-621 ◽  
Author(s):  
P. F. Fennessy ◽  
C. G. Mackintosh ◽  
G. H. Shackell
Keyword(s):  
Pregnancy Rate ◽  
Cervus Elaphus ◽  
Artificial Insemination ◽  
Red Deer ◽  
Pregnancy Rates ◽  
Progesterone Treatment ◽  
Serum Gonadotropin ◽  
The Difference ◽  
Fixed Times ◽  
In Pregnancy

ABSTRACTSix experiments involving the artificial insemination (AI) of a total of 300 female red deer (hinds) with frozen-thawed red deer semen (collected by electro-ejaculation) were conducted over 3 years. Insemination took place at fixed times following various oestrous synchronization procedures using progesterone withdrawal and treatment with pregnant mare's serum gonadotropin (PMSG). In the 1st year, the experiments evaluated basic AI techniques in which pregnancy rates were 45% in 20 hinds receiving two inseminations per vaginam (PV) and 56% in 27 hinds inseminated by the laparoscopic intrauterine method (IU). In the 2nd year, the experiments involved comparisons of the progesterone regime, one or two PV inseminations, and the timing of a single PV insemination. There was no effect of replacement of the progesterone device after 9 days and withdrawal 3 days later compared with the use of one device for the whole period in two experiments. The pregnancy rate for a double PV insemination was significantly higher than for a single PV insemination (58 and 34%; P < 0·05) and there was also a small effect of timing of insemination relative to the synchronization treatment. In the 3rd year all hinds were inseminated by the IU method. The experiments involved a comparison of various times of AI following progesterone withdrawal and a comparison of the progesterone regime. The overall pregnancy rate for 63 hinds inseminated was 56% with no difference between three times of insemination (48, 52 and 55 h). In the second experiment, the difference in pregnancy rate between treatment with progesterone for 15 days and 12 days (44 and 72% for 18 hinds per group) was not significant, but the interaction between the length of progesterone treatment and insemination time was significant (P < 0·05), with the 12-day progesterone/55 h insemination giving a much higher pregnancy rate than the 15-day/55 h insemination (89 and 20% respectively). Although no experiments involved direct comparisons of the routes of insemination, overall pregnancy rates were 56% for IU, 53% for double PV and 35% for single PV inseminations.

scholarly journals Regulation of uterine function during estrous cycle, anestrus phase and pregnancy by steroids in red deer (Cervus elaphus L.)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Angelika M. Kotlarczyk ◽  
Martyna Grzyb ◽  
Anna J. Korzekwa
Keyword(s):  
Estrous Cycle ◽  
Cervus Elaphus ◽  
Estrogen Receptor Alpha ◽  
Red Deer ◽  
Follicle Stimulating Hormone ◽  
Progesterone Receptors ◽  
Hydroxysteroid Dehydrogenase ◽  
Steroid Production ◽  
Steroid Synthesis ◽  
Cytochrome P450 Aromatase

AbstractSteroid synthesis and production in ruminant uterus is not obvious, especially in seasonally reproduced. We compared steroid production by investigating enzymes involved in red deer uterine steroid metabolism in reproductive seasons. Blood and uteri (endometrium and myometrium) were collected post mortem from hinds on 4th day (N = 8), 13th day of the cycle (N = 8), anestrus (N = 8) and pregnancy (N = 8). The expression of cytochrome P450 aromatase (P450), 3 -beta-hydroxysteroid dehydrogenase (3β-HSD), 17 -beta-hydroxysteroid dehydrogenase (17β-HSD), aldo–keto reductase family 1 C1 (AKR1C1), estrogen receptor alpha (ERα), and progesterone receptors (PRs), were analyzed using real-time-PCR and Western Blotting. Plasma samples were assayed for 17-beta-estradiol (E2), progesterone (P4), luteinizing hormone (LH), follicle-stimulating hormone (FSH), and testosterone (T4) concentrations by EIA. Hinds at the beginning of the estrous cycle, mainly in endometrium, were characterized by a high mRNA expression of 3β-HSD, AKR1C1, PRs and ERα, contrary to the expression in myometrium during pregnancy (P < 0.05). For P4, E2, and FSH, concentration was the highest during the 13th day of the estrous cycle (P < 0.05). Uterine steroid production and output in hinds as a representative seasonally reproduced ruminant occurred mainly during the estrous cycle and sustained in anestrus.

Fixed-time artificial insemination in red deer (Cervus elaphus) in Argentina

2009 ◽  
Vol 115 (1-4) ◽  
pp. 312-316 ◽  
Author(s):  
J.F. Aller ◽  
O. Fernandez ◽  
E. Sanchez
Keyword(s):  
Cervus Elaphus ◽  
Artificial Insemination ◽  
Red Deer ◽  
Fixed Time

scholarly journals ANGKA KEBUNTINGAN SAPI LOKAL SETELAH DIINDUKSI DENGAN PROTOKOL OVSYNCH (Conception Rates of Local Cows after Induction with Ovsynch Protocols)

2015 ◽  
Vol 9 (2) ◽  
Author(s):  
Mefrianti Efendi ◽  
Tongku Nizwan Siregar ◽  
Hamdan Hamdan ◽  
Dasrul Dasrul ◽  
Cut Nila Thasmi ◽  
...  
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Estrus Synchronization ◽  
Multiple Injection ◽  
Treatment Groups ◽  
Group I ◽  
Conception Rates ◽  
Group Ii

This study aims to know the effect of estrus synchronization using ovsynch method on local cow pregnancy rate. This study used 10 local cows without pregnant status and clinically healthy. All cows were divided into 2 treatment groups. Cows in group I (K1) were synchronized estrus using 5 mg/ml PgF2α intramuscularly with multiple injection patterns with intervals of 10 days. Group II (KII) was synchronized by ovsynch protocol, initiated with injection of 1ml GnRH on day-0. On the 7th day, the whole cows in K II were injected with 2 ml PgF2α then followed by re-injected with 1 ml of GnRH on the 9th day. Artificial insemination was performed 24 hours after GnRH last injection. The data were analyzed descriptively. The results showed that 3 cows in group I were diagnosed pregnant (60%), whereas in group II, 4 cows werediagnosed pregnant (80%). In conclusion, the estrus synchronization with ovsynch protocols provide a higher pregnancy rate than the conventional estrus synchronization.Key words: synchronization, ovsynch, GnRH, PgF2α

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