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Artificial insemination

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https://www.readbyqxmd.com/read/29352501/predictors-of-beef-calf-temperament-at-weaning-and-its-impact-on-temperament-at-breeding-and-reproductive-performance
#1
V R Kasimanickam, R L Abdel Aziz, H M Williams, R K Kasimanickam
Two experiments were conducted to determine (i) factors influencing calf temperament at weaning, (ii) association between heifer-calf temperament at weaning and temperament at breeding and (iii) effect of heifer-calf temperament on pregnancy rate per artificial insemination (P/AI). In experiment 1, beef cows and their calves (n = 285) from three farms were used. Sire docility estimated progeny difference (EPD) score, birth type (normal or assisted), calf gender, calf behaviour (during 1st 4 weeks) and calf health status (until weaning) were recorded...
January 19, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29350653/the-law-on-artificial-insemination-an-italian-anomaly
#2
Rossana Cecchi, Vittoria Masotti, Arturo Umberto Meo, Raffaella Rinaldi
The law on medically assisted procreation in Italy, from its entering into force, has undergone numerous amendments. This has been due to the fact that those citizens, directly affected by its imposed prohibitions, have not given in, bringing their requests before the courts, both nationally and internationally. Over the years, the courts through numerous rulings have significantly changed a law clearly incapable of protecting the rights of those involved. Currently Italy has an acceptable law on M.A.P. which is the result of the strong willing of citizens affected by problems of sterility or infertility...
January 16, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29332864/associations-of-periparturient-plasma-biochemical-parameters-endometrial-leukocyte-esterase-and-myeloperoxidase-and-bacterial-detection-with-clinical-and-subclinical-endometritis-in-postpartum-dairy-cows
#3
Sayed Ahmad Nazhat, Go Kitahara, Nobutoshi Kozuka, Shogo Mido, Mohammed Sadawy, Hossam El-Sheikh Ali, Takeshi Osawa
This study was aimed at demonstrating associations between peripheral biochemical parameters, endometrial leukocyte esterase (LE) and myeloperoxidase (MPO), and bacterial detection with the degree of endometrial inflammation, and determining the best time postpartum for diagnosing endometritis to predict subsequent fertility in dairy cows. Plasma albumin, blood urea nitrogen (BUN), total cholesterol (T-cho), NEFA, and BHBA concentrations were analyzed in 43 Holstein cows at 3, 5 and 7 weeks postpartum (W3, W5 and W7)...
January 12, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29331832/investigations-on-a-cryopreservation-protocol-for-long-term-storage-of-psittacine-spermatozoa-using-cockatiel-semen-as-an-example
#4
H Schneider, D Fischer, K Failing, C Ehling, S Meinecke-Tillmann, A Wehrend, M Lierz
The aim of the present study was the establishment of an effective protocol for cryopreservation of psittacine semen. Therefore, pooled semen samples of 30 cockatiels (Nymphicus hollandicus) were diluted with modified Lake diluent (1:4), partitioned into four equal parts. Three portions were mixed with three cryoprotectants (dimethylacetamide, dimethyl sulfoxide, glycerol) in 4%, 8% and 12% final concentration, respectively, whereas the 4rth part served as control. Altogether, 96 incremental diluted semen samples were obtained for investigation...
December 16, 2017: Theriogenology
https://www.readbyqxmd.com/read/29331829/additional-small-dose-of-prostaglandin-f2%C3%AE-at-timed-artificial-insemination-failed-to-improve-pregnancy-risk-of-lactating-dairy-cows
#5
J A Sauls, B E Voelz, L G D Mendonça, J S Stevenson
Two experiments were performed to test the hypothesis that administering PGF2α concurrent with timed artificial insemination (AI) in lactating dairy cows would enhance pregnancy per AI (P/AI). In experiment 1, lactating Holstein cows (n = 289) in one herd were enrolled after a non-pregnancy diagnosis (30-36 d after AI) to synchronize subsequent ovulation before AI. Cows were assigned randomly to receive (im) 10 mg of PGF2α concurrent with timed AI (Day 0; treatment) or no injection (control). Blood samples were collected on Days -3, 0, and 13 to determine serum concentrations of progesterone...
January 3, 2018: Theriogenology
https://www.readbyqxmd.com/read/29318710/evaluation-of-three-hormonal-protocols-for-anovulatory-lactating-cows-under-regulations-restricting-the-use-of-estrogenic-compounds
#6
Guang-Min Yu, Yue Wu, Xian-Long Wang, Shuan Zhao, Teruo Maeda, Shen-Ming Zeng
When European Union regulations restricted the use of estrogenic compounds in food-producing animals, refined hormonal protocols were no longer applicable for anovulatory cows. However, Ovsynch and its adaptations are routinely and uniformly applied to all cows regardless of ovarian function. To evaluate their efficacy on anovulatory cows, 143, 147 and 144 anovulatory cows received Ovsynch, Presynch and G6G protocols, respectively. In comparison, 150 cyclic cows were bred without using a synchronized protocol...
January 9, 2018: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29311520/validation-of-a-novel-timed-artificial-insemination-protocol-in-beef-cows-with-a-functional-corpus-luteum-detected-by-ultrasonography
#7
Hisashi Funakura, Ayumi Shiki, Yuji Tsubakishita, Shogo Mido, Hiromu Katamoto, Go Kitahara, Takeshi Osawa
This study aimed to clarify the feasibility of a novel timed artificial insemination (TAI) protocol using ultrasonography, and to determine the associations between the ovarian component and fertility. In Experiment 1,272 Japanese Black cows with a corpus luteum (CL) ≥ 18 mm in diameter were divided randomly into either the TRT group (134 cows that were administered gonadotropin-releasing hormone [GnRH] 56 h [day 2] after prostaglandin F2α [PGF] administration [day 0], followed by TAI 16-20 h later) or the CN-1 group (138 cows that were administered PGF followed by AI after estrus detection)...
January 5, 2018: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29310847/effects-of-long-term-near-term-and-real-time-energy-balance-and-blood-progesterone-concentrations-on-the-pregnancy-rate-of-contemporary-dairy-cows
#8
N A Gomez, A J Conley, P H Robinson
This study aimed to contribute to understanding the interface between reproductive and nutritional energetic physiology in contemporary dairy cattle. Multiparous Holstein cows (n = 32) between 70 and 180 days in milk were used in a study starting 10 d prior to the artificial insemination (AI) date and were estrous synchronized using a hormonal regimen. Fourteen cows were determined pregnant on day 39 post-AI. Coccygeal blood samples of all cows were collected on d -10 and -3 prior to AI to determine estrous cyclicity, as well as at AI and at 6, 13 and 20 d post-AI...
January 4, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29290440/short-communication-two-dominant-paternal-lineages-for-north-american-jersey-artificial-insemination-sires
#9
C D Dechow, W S Liu, J S Idun, B Maness
Jersey cattle are the second most prominent breed in the United States and represent a growing portion of the dairy cow population in the United States. The objectives of our study were to determine the male lineages of Jersey sires with official genetic evaluations and to determine whether there are differences in sire conception rate among lineages. Paternal lineages back to the 1950s were extracted from genetic evaluation files of the Council on Dairy Cattle Breeding (CDCB, Bowie, MD) for all sires with an official United States genetic evaluation and that were enrolled with the National Association of Animal Breeders (Madison, WI)...
December 28, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29288976/maternal-parity-affects-placental-development-growth-and-metabolism-of-foals-until-1-year-and-a-half
#10
M Robles, C Dubois, C Gautier, M Dahirel, I Guenon, H Bouraima-Lelong, C Viguié, L Wimel, A Couturier-Tarrade, P Chavatte-Palmer
Primiparous mares are known to produce smaller foals than multiparous mares. This difference seems to be partly explained by the reduced exchange surface and volume of the placental villi in primiparous compared to multiparous placentas. The effect of maternal parity on foals' post-natal growth, metabolism and sexual maturation, however, has been given little consideration. The objectives of this work were to analyse placental biometry and structure at term, growth of foals and yearlings, their metabolism and testicular maturation at one year of age...
December 21, 2017: Theriogenology
https://www.readbyqxmd.com/read/29287895/a-two-step-dilution-tris-egg-yolk-extender-containing-equex-stm-significantly-improves-sperm-cryopreservation-in-the-african-wild-dog-lycaon-pictus
#11
Femke Van den Berghe, Monique Christina Johanna Paris, Michael Brent Briggs, Wenche Kristin Farstad, Damien Boyd Bertrand Paul Paris
Conservation management of endangered African wild dogs (AWD; Lycaon pictus) can benefit greatly from development of sperm freezing and artificial insemination. Previous freezing attempts yielded nearly 0% motile sperm within 2 h of thawing. In this study, two canine freezing protocols were tested: Protocol 1: a one-step dilution in TRIS-20% egg yolk containing 8% glycerol; and Protocol 2: a two-step dilution in TRIS-20% egg yolk containing a final extender concentration of 5% glycerol and 0.5% Equex STM, coupled with a TRIS-citrate-fructose thawing solution...
December 26, 2017: Cryobiology
https://www.readbyqxmd.com/read/29287623/olfactory-stimulation-or-inhibition-of-sexual-behavior-of-stallions-in-non-breeding-season
#12
Daniel Guillaume, Chantal Moussu, Frédéric de Geoffroy, Didier Chesneau, Matthieu Keller
Stallions show decreased sexual responses and activities during short days in winter. To evaluate the importance of sexual olfactory communication in horses, we tested whether sexual responses could be stimulated through various sexual olfactory stimulations in winter. To this end, we presented stallions with various olfactory stimulations (urine from mares at different stages of the reproductive cycle, urine from stallions or geldings, or chemically defined synthetic odorant) during the non-breeding season and measured their behavioral responses through (1) a test of olfactory investigation (olfactory investigation and flehmen behavior) and (2) a test of sexual activity in the context of semen collection for artificial insemination...
December 26, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29274053/pregnancy-rate-in-water-buffalo-following-fixed-time-artificial-insemination-using-new-or-used-intravaginal-devices-with-two-progesterone-concentrations
#13
J C Gutiérrez-Añez, R A Palomares, J R Jiménez-Pineda, A R Camacho, G E Portillo-Martínez
This study evaluated the pregnancy rate (PR) after timed artificial insemination (TAI) in water buffalo (Bubalus bubalis) during both non-breeding and breeding season, using either a new or reused intravaginal device (IVD) with two different progesterone concentrations. A total of 247 dairy buffalo cows were randomly assigned using a two-by-three factorial design and four replicates to the following groups: (1) new intravaginal device (IVD-New: DIB®, 1.0 g of P4, n = 51 or CIDR®, 1.38 g of P4, n = 55); (2) intravaginal device previously used once (9 days) (IVD-Used1x: DIB, n = 40 or CIDR, n = 51); or (3) intravaginal device previously used twice (18 days) (IVD-Used2x: DIB, n = 27 or CIDR, n = 23)...
December 22, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29261700/effect-of-feeding-rumen-protected-methionine-on-productive-and-reproductive-performance-of-dairy-cows
#14
Mateus Z Toledo, Giovanni M Baez, Alvaro Garcia-Guerra, Nelson E Lobos, Jerry N Guenther, Eduardo Trevisol, Daniel Luchini, Randy D Shaver, Milo C Wiltbank
The objectives of this study were to evaluate the effects of daily top-dressing (individually feeding on the top of the total mixed ration) with rumen-protected methionine (RPM) from 30 ± 3 until 126 ± 3 Days in milk on productive and reproductive performance in lactating dairy cows. A total of 309 lactating dairy Holstein cows (138 primiparous and 171 multiparous) were randomly assigned to treatment diets containing either RPM (21.2 g of RPM + 38.8 g of dried distillers grain; 2.34% Methionine [Met] of metabolizable protein [MP]) or Control (CON; 60 g of dried distillers grain; 1...
2017: PloS One
https://www.readbyqxmd.com/read/29259460/possible-ability-of-bovine-follicular-fluid-to-attract-migrating-bull-spermatozoa
#15
Md Anisuzzaman Mondal, Yuji Takagi, Shoji A Baba, Koh-Ichi Hamano
Aim: To examine the potential of bovine follicular fluid (BFF) to attract bull spermatozoa. Methods: The ability of the BFF to attract bull sperm was evaluated by observing changes in sperm migration after being placed in a cross-column chamber. The movement parameters of the heads and flagella of the sperm that were attracted to the BFF were analyzed by using the Computer Assisted Sperm Analysis system. Results: It was observed that 61.6% of the bull sperm migrated toward the BFF when the BFF was used at a concentration of 0...
April 2017: Reproductive Medicine and Biology
https://www.readbyqxmd.com/read/29259456/protein-biomarkers-for-male-artificial-insemination-subfertility-in-bovine-spermatozoa
#16
REVIEW
Hiroshi Harayama, Kenta Minami, Kazumi Kishida, Taichi Noda
Background: Although artificial insemination (AI) technique is an established biotechnology for bovine reproduction, the results of AI (conception rates) have a tendency to decline gradually. To our annoyance, moreover, AI-subfertile bulls have been occasionally found in the AI centers. To resolve these serious problems, it is necessary to control the sperm quality more strictly by the examinations of sperm molecules. Methods: We reviewed a number of recent articles regarding potentials of bovine sperm proteins as the biomarkers for bull AI-subfertility and also showed our unpublished supplemental data on the bull AI-subfertility associated proteins...
April 2017: Reproductive Medicine and Biology
https://www.readbyqxmd.com/read/29258698/monitoring-and-controlling-ovarian-activity-in-wild-felids
#17
Ampika Thongphakdee, Wanlaya Tipkantha, Chainarong Punkong, Kaywalee Chatdarong
In the past decade, studies on reproductive biology, endocrinology, and assisted reproductive technologies (ARTs) in the domestic cat have contributed to a lot of progress in conservation breeding of wild felids. However, the 36 species of the Felidae family have species- and individual-specific reproductive cycles and respond differently to exogenous hormones. Monitoring the ovarian cycle of wild felids can improve their natural breeding and maximize their reproductive success. Moreover, fundamental knowledge on the hormonal patterns of each feline species offers the opportunity to develop ARTs, particularly in threatened and endangered species...
December 11, 2017: Theriogenology
https://www.readbyqxmd.com/read/29248844/effect-of-increasing-equilibration-time-of-diluted-bull-semen-up-to-72%C3%A2-h-prior-to-freezing-on-sperm-quality-parameters-and-calving-rate-following-artificial-insemination
#18
E M Murphy, B Eivers, C M O'Meara, P Lonergan, S Fair
An equilibration period of approximately 3-4 h prior to semen cryopreservation is standard practice for maintaining membrane integrity and motility of bull sperm. However, a number of studies indicate that an overnight equilibration period prior to freezing results in improved post-thaw semen quality thus optimising pregnancy rates. The aim of this study was to assess the effect of increasing the equilibration time of bull semen up to 72 h before freezing on sperm quality parameters and calving rate (CR) following artificial insemination (AI) with frozen-thawed semen...
December 2, 2017: Theriogenology
https://www.readbyqxmd.com/read/29248225/reproductive-performance-and-herd-exit-dynamics-of-lactating-dairy-cows-managed-for-first-service-with-the-presynch-ovsynch-or-double-ovsynch-protocol-and-different-duration-of-the-voluntary-waiting-period
#19
M L Stangaferro, R Wijma, M Masello, J O Giordano
The objective of this experiment was to evaluate the reproductive performance and herd exit dynamics of dairy cows managed for first service with programs varying in method of submission for insemination and voluntary waiting period (VWP) duration. Holstein cows from a commercial farm in New York were randomly allocated to receive timed artificial insemination (TAI) after the Double-Ovsynch protocol (GnRH, 7 d later PGF2α, 3 d later GnRH, 7 d later GnRH, 7 d later PGF2α, 56 h later GnRH, and 16 to 18 h later TAI) at 60 ± 3 d in milk (DIM) (DO60 = 458), TAI after Double-Ovsynch at 88 ± 3 DIM (DO88 = 462), or a combination of AI at detected estrus (starting at 50 ± 3 d in milk) and TAI with the Presynch-Ovsynch protocol (PGF2α, 14 d later PGF2α, 12 d later GnRH, 7 d later PGF2α, 56 h later GnRH, and 16 to 18 h later TAI; PSOv = 450)...
December 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29239050/therapeutic-potential-of-amniotic-fluid-stem-cells-to-treat-bilateral-ovarian-dystrophy-in-dairy-cows-in-a-subtropical-region
#20
L-B Chang, S-Y Peng, C-J Chou, Y-J Chen, J-S Shiu, P-A Tu, S-X Gao, Y-C Chen, T-K Lin, S-C Wu
Amniotic fluid is a rich source of multipotent mesenchymal stem cells (MSCs). Amniotic fluid stem cells (AFSCs) have become a new source of stem cells; they have low immunogenicity and are easily harvested. For this reason, they may be useful in clinical tissue engineering. Moreover, AFSCs have anti-inflammatory properties and can repair tissues. This study evaluated the utility of AFSC injection to treat bilateral ovarian dystrophy in Holstein-Friesian cows. Bovine AFSCs (BAFSCs) were collected at slaughter from Holstein-Friesian cows during the third or fourth month of pregnancy and cultured in vitro...
December 14, 2017: Reproduction in Domestic Animals, Zuchthygiene
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