scholarly journals COMPARISON OF NATURAL MATING AND ARTIFICIAL INSEMINATION ON REPRODUCTIVE PERFORMANCE OF THREE STRAINS OF SHEEP HOUSED IN TOTAL CONFINEMENT

1981 ◽  
Vol 61 (4) ◽  
pp. 907-912 ◽  
Author(s):  
A. J. HACKETT ◽  
M. S. WOLYNETZ
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Late Summer ◽  
Estrous Cycles ◽  
Semen Collection ◽  
Significant Difference ◽  
Natural Mating ◽  
Artificial Vagina

The reproductive performance (fertility, prolificacy and fecundity) of confined sheep was measured following natural mating or artificial insemination (AI) with 0.1 mL of unextended semen collected by artificial vagina or by electroejaculation. The estrous cycles of the ewes were synchronized in late summer using intravaginal sponges impregnated with fluorogestone acetate. Pregnant mares' serum gonadotrophin (PMSG) was administered intramuscularly to approximately half of the ewes. There was no significant difference in the reproductive performance of ewes bred by natural mating (45%) or AI (30%) or between the two methods of semen collection (30 vs. 29%). Fertility was greater (P < 0.05) in ewes treated with PMSG (33 vs. 11%) mainly because of a tendency for higher fertility in ewes bred by AI. PMSG also significantly (P < 0.01) increased prolificacy and fecundity, 1.8 vs. 1.5 and 58 vs. 16%, respectively.

COMPARISON OF ARTIFICIAL INSEMINATION AND NATURAL MATING ON REPRODUCTIVE PERFORMANCE OF FIVE STRAINS OF SHEEP DURING THE ANESTROUS SEASON IN AN INTENSIVE SYSTEM

1979 ◽  
Vol 59 (4) ◽  
pp. 675-683 ◽  
Author(s):  
A. J. HACKETT ◽  
H. A. ROBERTSON ◽  
E. K. INSKEEP ◽  
J. N. B. SHRESTHA ◽  
M. S. WOLYNETZ
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Hormone Treatment ◽  
Corpora Lutea ◽  
Blood Samples ◽  
Natural Mating ◽  
Main Effects ◽  
Mating Method ◽  
Intensive System

Synchronized estrus and ovulation were induced during the anestrous season (April–May 1974) in 373 ewes of three synthetic (one sire and two dam) strains and two unselected (Suffolk and Finnish Landrace) purebred strains by treatment with 30 mg fluorogestone acetate (FGA) impregnated in polyurethane intravaginal sponges for 12 days. Following sponge removal each ewe received 500 IU pregnant mares’ serum gonadotrophin (PMSG) IM. Of these, 167 were bred by artificial insemination (AI) at 48 and 60 h post sponge removal with 0.2 ml raw unextended semen collected by electroejaculation (EE). Five days after AI, ewes were exposed to a follow up ram for 16 days for subsequent mating if a second estrus occurred. The remaining 206 were exposed to rams for a period of 22 days for natural mating. Blood samples were collected from 69 ewes, 9, 19 and 27 days post sponge removal and analyzed for progesterone to ascertain if corpora lutea were formed and whether the ewes recycled. The age of ram by mating method interaction significantly affected both fertility and fecundity mainly because some of the younger rams lacked libido and experience for natural mating. There were no significant differences in prolificacy due to any of the main effects tested. Among the 69 ewes examined for progesterone levels, 93% had formed corpora lutea after hormone treatment and 16% recycled. Only 16 of the 255 ewes that did not conceive to the synchronized estrus lambed to the subsequent estrus.

Factors affecting reproductive performance of white-tailed deer subjected to fixed-time artificial insemination or natural mating

2013 ◽  
Vol 25 (3) ◽  
pp. 581 ◽  
Author(s):  
Miguel Mellado ◽  
Claudia G. Orta ◽  
Eloy A. Lozano ◽  
Jose E. García ◽  
Francisco G. Veliz ◽  
...  
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Fixed Time ◽  
Arid Environment ◽  
Factors Affecting ◽  
Litter Weight ◽  
Subsequent Period ◽  
Natural Mating ◽  
Game Hunting

The objectives of this study were to examine the effects of several factors affecting fawning rate, litter size, litter weight and neonatal fawn mortality in white-tailed deer inseminated either transcervically or by means of laparoscopy. Oestrus synchronisation with a controlled internal drug release (CIDR)-based protocol and fixed-time artificial insemination (FTAI) was conducted in 130 white-tailed deer (Odocoileus virginianus texanus) during three reproductive seasons (2007–2009; 271 services) in a game-hunting ranch in a hot–arid environment (26°4′ N, 101°25′ W). Ninety additional non-treated does were exposed to bucks for natural mating. Fawning rate did not differ between AI methods (40.0 vs 45.0% for transcervical and laparoscopic AI, respectively). Overall fawning rate (proportion of all does fawning after FTAI and a subsequent period of buck exposure) did not differ between transcervical (89.5%), laparoscopic (80.3%) or natural (88.9%) insemination. Litter size per fawning doe was higher (P&lt;0.05) in naturally-served does (1.65±0.48) than in transcervically-inseminated does (1.40±0.51) or in laparoscopically-inseminated does (1.48±0.50). The main conclusion was that no enhancement of fawning rate or litter size occurred as a result of intrauterine deposition of semen by laparoscopy compared with the transcervical insemination technique.

scholarly journals Sperm concentration on the intrauterine artificial insemination in swine

2009 ◽  
Vol 33 (6) ◽  
pp. 1671-1674
Author(s):  
Joana Miller ◽  
Ana Luísa Neves Alvarenga ◽  
Luis David Solis Murgas ◽  
Adriana Cristina da Silva ◽  
Ricardo Sales Araújo ◽  
...  
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Intrauterine Insemination ◽  
Sperm Concentration ◽  
Conception Rate ◽  
Cervical Canal ◽  
Significant Difference ◽  
Estrus Detection ◽  
Farrowing Rate

The aim of this work was to evaluate the efficiency of the intrauterine insemination (IUI) in swine, considering the conception rate, farrowing rate, litter size (alive born pigs). For the IUI, the females had been insemination at 24 and 48 hours after the estrus detection, and the inseminating doses of 500 million, 1 billion, 1.5 billion and 2 billion spermatozoa in 20 mL extender had been used. The procedure of catheter insertion through the cervical canal was successfully performed in 97.9% of the females. The conception rate was 6.3% in the IUI. The farrowing rate in IUI was 87.2% but the farrowing rate was 100% for the sperm concentration of 500 million. Regarding the number of born pigs and alive born pigs observed in females inseminated with IUI, no significant difference was observed (p > 0.05). The concentration of 500 x 10(6) spermatozoa in 20 mL extender in the intrauterine insemination resulted in an optimal reproductive performance.

scholarly journals Breeding profiles at the periparturient stage in captive red foxes (Vulpes vulpes) mating naturally or subjected to artificial insemination in Japan

2019 ◽  
Vol 63 (2) ◽  
pp. 299-302
Author(s):  
Minoru Yatu ◽  
Mitsuhiro Sato ◽  
Jin Kobayashi ◽  
Toshihiro Ichijyo ◽  
Hiroshi Satoh ◽  
...  
Keyword(s):  
Artificial Insemination ◽  
Red Fox ◽  
Clinical Importance ◽  
Red Foxes ◽  
Bovine Semen ◽  
Significant Difference ◽  
Conception Rates ◽  
In Captivity ◽  
Natural Mating ◽  
Semen Extender

AbstractIntroduction: Breeding profiles at the periparturient stage in red foxes which mated naturally or were subjected to artificial insemination were retrospectively surveyed using 130 vixens during their reproductive seasons of 2012–2017 in Japan. Material and Methods: Natural mating vixens were encouraged a maximum of three times with the same male, while artificial insemination was conducted using frozen-thawed semen with the bovine semen extender as a diluent. Results: With natural mating, conception rates after one, two, and three copulations were 55.8%, 68.0%, and 85.7%, respectively, showing a significant difference between the rates for one and three copulations. Conception rates with artificial insemination were 82.4%. Mean gestation periods were between 52.1 and 53.3 days in all groups. Mean litter sizes were 3.7–4.3 cubs with natural mating, and 4.4 cubs with artificial insemination. Although some sporadic and inconsistent changes in litter sizes were noted between primiparous and multiparous groups, these were of doubtful clinical importance. Conclusion: This is the first report from Japan concerning basic breeding events of red fox vixens in captivity.

scholarly journals EFFECT OF OMEGA 3 ON THE REPRODUCTIVE PERFORMANCE OF THE ALGERIAN SYNTHETIC RABBIT IN ARTIFICIAL INSEMINATION

AGROFOR ◽  
2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Khedidja BOUDOUR ◽  
El hassen LANKRI ◽  
Ahmed AICHOUNI ◽  
Nacira ZERROUKI ◽  
Mokhtar SAIDI
Keyword(s):  
Fish Oil ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Marked Improvement ◽  
Animal Origin ◽  
Omega 3 ◽  
Live Births ◽  
Significant Difference

In the present work of the pubescent and immature rabbit does of the Algerian synthetic strain (ITELV 2006), the animals received a supplement of omega 3 of animal origin (fish oil) or vegetable origin (linseed) for 3 months (2 months before AI and 1 month during pregnancy). The females were followed until parturition in order to study the effect of omega 3 on their reproductive performance (fertility, prolificacy and stillbirth). Comparison of data between the six lots (Control puberts (CP), Control peripubertal (CPE), Linen grains pubertal (LGP), Linen grains peripubertal (LGPE), Fish oil puberts (FOP) and Fish oil peripubertal (FOPE)) for parameters of born deaths (BD), fertility and stillbirth rates showed no significant difference (P>0.05). Whereas for total births (TB), live births (LB) and weaner births (WB), the differences are significant (P0.05). A very marked improvement in prolificity has been achieved by the incorporation of fish oil and flaxseed into the feed of the rabbits. In fact, the females of these two lots recorded the highest values (10.37 TB, 9.87LB, 9.3 WB and 10.44 TB, 9.77LB, 8.77WB respectively for FOPE and LGPE), as opposed to the unpunished rabbits of the control lot which gave the lowest numbers (7.14TB, 6.57LB and 6.57WB).

scholarly journals Use of cooled buffalo semen as a strategy to increase conception rates in fixed-time artificial insemination programs during unfavorable reproductive periods

2021 ◽  
Vol 73 (3) ◽  
pp. 560-570
Author(s):  
J. Almeida ◽  
M.F. Brito ◽  
B.P. Neves ◽  
V.A.B. Becerra ◽  
P.A. Auler ◽  
...  
Keyword(s):  
Artificial Insemination ◽  
Fixed Time ◽  
Reproductive Season ◽  
The Other ◽  
Reproductive Efficiency ◽  
Frozen Semen ◽  
Significant Difference ◽  
Buffalo Semen ◽  
Four Blocks ◽  
Artificial Vagina

ABSTRACT The objective of this study was to compare the reproductive efficiency of dairy buffaloes undergoing fixed-time artificial insemination (FTAI) protocols based on progesterone/estrogen (P4/E2) and eCG during unfavorable breeding season using cooled (CS) and frozen semen (FS). A total of 446 buffaloes (> 40 days postpartum) were randomly distributed into four blocks (years): B1-2014 (n = 143), B2-2015 (n = 34), B3-2016 (n = 90), and B4-2017 (n = 179). Each block was subdivided into two (AI with CS and FS using the same ejaculate of each bull). Thus, the block subdivision was as follows: B1 (CS = 71 and FS = 72); B2 (CS = 18 and FS = 16); B3 (CS = 47 and FS = 43); and B4 (CS = 90 and FS = 89). The ejaculates of eight Murrah bulls collected using an artificial vagina were divided into two aliquots: one aliquot was diluted in Botu-Bov® commercial extender and cooled (BB-CS), and the other was diluted in the same extender and frozen (BB-FS). BB-CS aliquots were cooled at 5 °C/24 h using a refrigerator. BB-FS group aliquots were also cooled, and after equilibrating at 5 °C for 4 h, were placed in a 21-L Styrofoam box, 5 cm above the surface of liquid nitrogen. In the afternoon (A) on D0 (2:00 p.m.) the animals received EB 2.0 mg IM (Estrogin®) and an ear implant (CRESTAR® 3.0 mg P4). At D9 (A), the implant was removed, and the animals received eCG 400 IU IM (Folligon® 5000) + Cloprostenol PGF2α 0.530 mg IM (Sincrocio®). At D10 (A), the animals received EB 1.0 mg IM (Estrogin®), and at D12 (8:00 a.m.), AI was performed. At D42, pregnancy was diagnosed via ultrasonography. Total CRs were 48.2% CS and 34.6% FS for years 2014 to 2017, with a significant difference of 13.7% (P<0.05). In conclusion, cooled semen resulted in higher CR than frozen semen in dairy buffaloes under the P4/E2 and eCG FTAI during the unfavorable reproductive season.

scholarly journals Impact of vaccination on the reproductive performance of multiparous Nellore cows

2018 ◽  
Vol 38 (3) ◽  
pp. 456-461 ◽  
Author(s):  
Luiz C.L. Ferreira ◽  
Henrique J. Fernandes ◽  
Aline G. Silva ◽  
Carlos E. Fernandes ◽  
Iveraldo S. Dutra ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Pregnancy Loss ◽  
Serum Antibody ◽  
Fixed Time ◽  
Beef Cows ◽  
Mato Grosso ◽  
Diarrhea Virus ◽  
Significant Difference ◽  
The Impact

ABSTRACT: Two experiments were conducted to evaluate the impact of two vaccines on the reproductive performance of multiparous beef cows in Mato Grosso do Sul, Midwest Brazil. In Experiment 1,765 calved multiparous Nellore cows were subjected to the same fixed-time artificial insemination (FTAI) protocol and rebred. Ultrasound pregnancy diagnosis was performed 30 and 90 days post-FTAI (DPI). Rates of pregnancy and pregnancy loss were determined for three periods: from 30 to 90 DPI, from 30 DPI to calving, and from 90 DPI to calving. The cows were assigned to three groups with different vaccination protocols - namely, Group VACMULT (n=250): vaccine against bovine herpesvirus 1 (BoHV-1), bovine viral diarrhea virus (BVDV), and leptospirosis; Group VACL (n=245): vaccine against leptospirosis alone; Group NOVAC (n=270): no vaccination. Serum antibody titers for BoHV-1, BVDV, and leptospirosis, measured in 57 cows from each group indicated active infection, suggesting circulation of these pathogens in the herd. No differences in pregnancy rates were observed across groups. Pregnancy loss rates did not differ significantly across groups within any of the periods investigated (30 to 90 DPI, 30 DPI to calving, or 90 DPI to calving). In Experiment 2, two vaccination protocols for each vaccine were investigated. Group VACGEST was vaccinated on day zero of FTAI (D0) and again 30 days post-FTAI (30 DPI). Group VACPREV was vaccinated on D0 and again on the day of insemination (D11). No significant difference was observed between groups, or significant gestational loss in the group that received the second vaccine on the day of insemination. The results revealed that neither vaccine interfered with the reproductive performance of multiparous cows. No differences were observed between vaccination carried out on both D0 and D11 and that performed on both D0 and D30. The performance of the IBR/BVDV/Leptospirosis vaccine on the day of the artificial insemination did not cause adverse effects on the reproductive parameters.

Reproductive performance in the Sheep CRC Information Nucleus using artificial insemination across different sheep-production environments in southern Australia

2014 ◽  
Vol 54 (6) ◽  
pp. 715 ◽  
Author(s):  
K. G. Geenty ◽  
F. D. Brien ◽  
G. N. Hinch ◽  
R. C. Dobos ◽  
G. Refshauge ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Reproductive Rate ◽  
Industry Standards ◽  
Frozen Semen ◽  
Production Environments ◽  
Natural Mating ◽  
Sheep Production ◽  
Reproductive Rates ◽  
Birth Type

The present paper covers reproductive performance in an artificial-insemination (AI) program of the Sheep CRC Information Nucleus with 24 699 lambs born at eight locations in southern Australia across five lambings between 2007 and 2011. Results from AI with frozen semen compared well with industry standards for natural mating. Conception rates averaged 72%, and 1.45 lambs were born per ewe pregnant for Merino ewes and 1.67 for crossbreds. Lamb deaths averaged 21% for Merino ewes and 15% for crossbreds and 19%, 22% and 20% for lambs from ewes that were mated to terminal, Merino and maternal sire types, respectively. Net reproductive rates were 82% for Merino ewes and 102% for crossbreds. From 3198 necropsies across 4 years, dystocia and starvation-mismothering accounted for 72% of lamb deaths within 5 days of lambing. Major risk factors for lamb mortality were birth type (single, twin or higher order), birthweight and dam breed. Losses were higher for twin and triplet lambs than for singles and there was greater mortality at relatively lighter and heavier birthweights. We conclude that reproductive rate in this AI program compared favourably with natural mating. Lamb birthweight for optimum survival was in the 4–8-kg range. Crossbred ewes had greater reproductive efficiency than did Merinos.

scholarly journals Comparative evaluation of reproductive performance of artificially inseminated and naturally mated Nigeria indigenous hens treated with clomiphene citrate

2020 ◽  
Vol 44 (1) ◽  
pp. 198-202
Author(s):  
S. M. O. C. Urom
Keyword(s):  
Treatment Group ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Comparative Evaluation ◽  
Egg Production ◽  
Clomiphene Citrate ◽  
Treatment Groups ◽  
Group A ◽  
Natural Mating ◽  
Group B

The research was conducted for 90 days using 96 and 16 Nigeria indigenous hens and cocks respectively sexually matured (24 and 26 weeks old) to comparatively evaluate the effect of clomiphene citrate on the reproductive performance of Nigerian indigenous birds. The birds were divided into 2 groups of 48 hens per group respectively as group Aand group B. Group A were artificially inseminated while group B birds were naturally mated. Each group was divided into 4 treatment groups of 12 hens per treatment. Clomiphene citrate was administered at 0mg (control), 10mg, 20mg and 30mg levels to the treatment groups represented as T1AI T2AI T3AI and T4AI and T1NM , T2NU , T3NN and T4NM for artificially inseminated and Naturally mated hens respectively and T1C T2C T3C and T4C for the cocks. The birds were fed adlibitum with breeder's mash for hens and growers mash for cock while water was served regularly. Seven days after clomiphene citrate was administered. Birds for natural mating were paired with their respective cocks according to their treatment groups, while those for artificial insemination were inseminated using cocks in the same treatment group. The ration was 2:12. The result of this study indicated higher productivity in artificially inseminated hens between (50-76 eggs) than naturally mated hens which produce between 42-63 eggs within this period. Artificial insemination also showed higher fertility of (62 to 85.25%) than the naturally mated that recorded between 34.88% to 78.5% fertility but the naturally mated recorded hatchability of between 53.35% and 90.90% while artificially inseminated hens recorded between 46.15% and 90.32%. Artificial inseminated birds recorded between 3.7% and 33.85% and 3.57% and 20.15% dead in germ and dead in shell respectively, while naturally mated hens recorded between 3.78% and 19.21%, and 2.01% and 15.79% in dead in germ and dead in shell respectively. The result of this study shows that artificial inseminated birds treated with clomiphene citrate encourages egg production and fertility.

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