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1. Intraovarianism and differences in ovulation frequency between left and right ovaries in Bos taurus heifers

Author:
Ginther, O.J.; Gomez-León, Victor E.
Source:
Reproductive Biology 2020 v.20 no.3 pp. 333-337
ISSN:
1642-431X
Subject:
heifers,   etc   ; animal ovaries; ovulation;     Show all 3 Subjects
Abstract:
... Sides of ovulation at beginning and end of an interovulatory interval (IOI) were studied for 10 successive ovulations in each of 100 heifers (1000 ovulations, 900 IOI). The frequency of side for 1000 ovulations was less (P < 0.0002) for the left ovary (LO or L; 44.4 %) than for the right ovary (RO or R; 55.6 %). Number of observed ratios of L to R was determined within each of 100 sets of 10 ovula ...
DOI:
10.1016/j.repbio.2020.05.006

2. Effect of progesterone administration during growing phase of first dominant follicle on follicular wave pattern in buffalo heifers

Author:
Jan, M. H.; Kumar, H.; Kumar, S.; Sharma, R. K.; Gupta, A.; Mehrara, K. L.
Source:
Tropical animal health and production 2020 v.52 no.3 pp. 1395-1402
ISSN:
0049-4747
Subject:
heifers,   etc   ; buffaloes; ovarian follicles; ovulation; progesterone;     Show all 5 Subjects
Abstract:
... In buffaloes, like other domestic mammals, antral follicles develop in a wave-like pattern. Factors predictive of a particular follicular wave pattern are yet to be identified. In this study, we examined the preponderance of 2- versus 3-wave patterns in 46 interovulatory intervals (IOIs) from 36 buffalo heifers, in which a subset of 10 heifers was scanned for 2 consecutive IOIs to record the repea ...
DOI:
10.1007/s11250-019-02143-2

3. Effect of number of 6-mm predeviation follicles and intraovarian patterns on right-side ovulation in heifers

Author:
Ginther, O.J.; Dangudubiyyam, S.V.
Source:
Animal reproduction science 2019
ISSN:
0378-4320
Subject:
heifers,   etc   ; ovarian follicles; ovulation;     Show all 3 Subjects
Abstract:
... The mechanisms underlying the greater frequency of ovulation from right ovary (RO) than left ovary (LO) were studied in 145 Bos taurus heifers. Diameter deviation during a follicular wave is indicated by continued diameter increase in the future preovulatory follicle (PF) and a decrease in diameter of future subordinate follicles. The PF (ovulation) was in the RO (63/105, 60%) more frequently (P < ...
DOI:
10.1016/j.anireprosci.2019.01.011

4. Differing planes of pre- and postweaning phase nutrition in Holstein heifers: I. Effects on feed intake, growth efficiency, and metabolic and development indicators

Author:
Rosadiuk, J.P.; Bruinjé, T.C.; Moslemipur, F.; Fischer-Tlustos, A.J.; Renaud, D.L.; Ambrose, D.J.; Steele, M.A.
Source:
Journal of dairy science 2021 v.104 no.1 pp. 1136-1152
ISSN:
0022-0302
Subject:
heifers,   etc   ; 3-hydroxybutyric acid; Holstein; average daily gain; blood; body condition; body weight; calves; dry matter intake; energy; feeding level; glucose; growth and development; insulin; insulin-like growth factor I; metabolites; metabolizable energy; milk consumption; rumen; starch; total mixed rations; volatile fatty acids; whole milk;     Show all 23 Subjects
Abstract:
... The objectives of this study were to determine the effects of pre- and postweaning planes of nutrition on feed and metabolizable energy (ME) intake, growth, concentrations of glucose, insulin, insulin-like growth factor 1 (IGF-1), and β-hydroxybutyrate (BHB) in blood and rumen volatile fatty acids (VFA) from birth to 25 wk of age in Holstein heifers. Heifer calves (n = 36) were randomly assigned t ...
DOI:
10.3168/jds.2020-18809

5. Role of intraovarian mechanisms and side of ovary on characteristics of follicle selection in Bos taurus heifers

Author:
Ginther, O.J.; Dangudubiyyam, S.V.
Source:
Theriogenology 2019 v.135 pp. 56-64
ISSN:
0093-691X
Subject:
heifers,   etc   ; animal morphology; ovarian follicles;     Show all 3 Subjects
Abstract:
... Intraovarian effects on diameter of future dominant follicle (DF or F1) and future largest subordinate follicle (F2) during the few days before selection of the future DF and subordinate follicles were studied in 147 bovine interovulatory intervals. Follicle selection involves diameter deviation or the beginning of separation of growth rates between F1 and F2. Diameter deviation is classified as c ...
DOI:
10.1016/j.theriogenology.2019.05.027

6. Scanning electron microscopy of the surface epithelium of the bovine endometrium

Author:
Kumro, F.G.; O'Neil, E.V.; Ciernia, L.A.; Moraes, J.G.N.; Spencer, T.E.; Lucy, M.C.
Source:
Journal of dairy science 2020 v.103 no.12 pp. 12083-12090
ISSN:
0022-0302
Subject:
heifers,   etc   ; corpus luteum; endometrium; epithelium; estrus; microvilli; ovarian follicles; pregnancy; scanning electron microscopy; slaughter;     Show all 10 Subjects
Abstract:
... The surface epithelium of the bovine endometrium comprises at least 2 cell types (ciliated cells and secretory cells with microvilli), but their distribution and morphological changes over the estrous cycle are poorly understood. The objective was to quantify the number of ciliated cells and assess morphological changes in secretory cells on the uterine surface epithelium during the estrous cycle. ...
DOI:
10.3168/jds.2020-18852

7. Disbudding affects use of a shelter provided to group-housed dairy calves

Author:
Gingerich, K.N.; Choulet, V.; Miller-Cushon, E.K.
Source:
Journal of dairy science 2020 v.103 no.11 pp. 10519-10529
ISSN:
0022-0302
Subject:
heifers,   etc   ; Holstein; bulls; dairy calves; drug therapy; group housing; nerve tissue; pain; plastics; solar radiation;     Show all 10 Subjects
Abstract:
... Disbudding in dairy calves is well established as a painful procedure with broad effects on behavior. The hypothesis of this experiment was that group-housed calves subjected to hot-iron disbudding would exhibit social withdrawal, based on use of a shelter providing physical and visual seclusion from the rest of the pen. We examined effects of hot-iron disbudding on use of this shelter, including ...
DOI:
10.3168/jds.2020-18267

8. Increased yearling weight as a proportion of 21-month weight was associated with increased milk production in dairy heifers

Author:
Handcock, RC; Lopez-Villalobos, N; McNaughton, LR; Back, PJ; Edwards, GR; Hickson, RE
Source:
New Zealand veterinary journal 2020 v.68 no.5 pp. 272-282
ISSN:
1176-0710
Subject:
dairy heifers,   etc   ; Holstein; Jersey; body weight; crossbreds; lactation; milk; milk yield; models; yearlings; New Zealand;     Show all 11 Subjects
Abstract:
... Aims: To examine the relationship between liveweight (LWT) at 12 months as a proportion of LWT at 21 months of age (LWT(12/21)%) and first lactation and cumulative 3-year milk production in dairy heifers in New Zealand. Methods: Liveweight and milk production records were obtained for dairy heifers born from June to December (spring-calving season) between 2006–2007 and 2013–2014 dairy seasons; pr ...
DOI:
10.1080/00480169.2020.1750498

9. Spontaneous abortion in cattle after consumption of Hesperocyparis (Cupressus) macrocarpa (Hartw.) Bartel and Cupressus arizonica (Greene) needles in Uruguay

Author:
Buroni, Florencia; Gardner, Dale R.; Boabaid, Fabiana M.; Oliveira, Luiz G.S.; de Nava, Guillermo; López, Fabiana; Riet-Correa, Franklin
Source:
Toxicon 2020 v.181 pp. 53-56
ISSN:
0041-0101
Subject:
heifers,   etc   ; Casuarina cunninghamiana; Cupressus arizonica; abortifacients; abortion (animals); fetus; histology; labdane; pastures; pregnancy; trees; Uruguay;     Show all 12 Subjects
Abstract:
... An outbreak of cattle abortion associated with the consumption of Hesperocyparis (Cupressus) macrocarpa and Cupressus arizonica needles has been reported in Uruguay. Twenty-five of 125 pregnant heifers in late-term pregnancy aborted after being introduced into a paddock containing numerous H. macrocarpa, C. arizonica and Casuarina cunninghamiana trees. There were no significant macroscopic or hist ...
DOI:
10.1016/j.toxicon.2020.04.104

10. Reproductive Failure and Long-Term Profitability of Spring- and Fall-Calving Beef Cows

Author:
Boyer, Christopher N.; Griffith, Andrew P.; DeLong, Karen L.
Source:
Journal of agricultural and resource economics 2020 v.45 no.1 pp. 78-91
ISSN:
1068-5502
Subject:
heifers,   etc   ; beef cows; calves; calving; herds; prices; profitability; simulation models; spring; weaning;     Show all 10 Subjects
Abstract:
... We determined how reproductive failure impacts the long-term profitability of beef cows in spring and fall-calving herds. Simulation models were established to generate distributions of net present value, payback periods, and breakeven prices of calves when a dam fails to wean zero, one, or two calves over her life. Results indicate that giving a dam another calving opportunity after failing to we ...
DOI:
10.22004/ag.econ.298435

11. Asynchrony between the early embryo and the reproductive tract affects subsequent embryo development in cattle

Author:
Rodríguez-Alonso, Beatriz; Sánchez, José María; Hamdi, Meriem; McDonald, Michael; Havlicek, Vitezslav; Besenfelder, Urban; Lonergan, Patrick; Rizos, Dimitrios
Source:
Reproduction, fertility, and development 2020 v.32 no.6 pp. 564-571
ISSN:
1031-3613
Subject:
heifers,   etc   ; corpus luteum; embryo (animal); embryo transfer; embryogenesis; oviducts; ovulation; slaughterhouses; uterus; zygote;     Show all 10 Subjects
Abstract:
... The aim of this study was to determine the effect of maternal–embryonic asynchrony in the reproductive tract (oviduct and uterus) on subsequent embryo development in cattle. Fifty Day 1invitro-produced zygotes were transferred endoscopically into the oviduct ipsilateral to the corpus luteum of heifers (n=40) that were either synchronous with the embryos (Day 1 after ovulation) or asynchronous and ...
DOI:
10.1071/RD19360

12. Setting targets for the Irish dairy industry

Author:
Shalloo, Laurence; Hanrahan, Liam
Source:
Animal production science 2020 v.60 no.1 pp. 159-163
ISSN:
1836-0939
Subject:
heifers,   etc   ; contractors; dairy industry; farm labor; farms; grasses; milk; milk fat; milk prices; rearing; sales;     Show all 11 Subjects
Abstract:
... A resilient dairy business will be sustainable across all of the sustainability indicators, survive milk-price drops and be very profitable when milk price is high. The term resilient means able to ‘recover, respond, deal or withstand’ different internal and external challenges that may manifest themselves within the farm business from time to time. There is significant potential to increase effic ...
DOI:
10.1071/AN18531

13. 176 Synchronisation of follicle wave emergence prior to superstimulation with purified FSH for ovum pickup affects blastocyst rate in pregnant Holstein heifers

Author:
Carrenho-Sala, L.; Fosado, M.; Sala, R.; Peralta, E.; Pereira, D.; Moreno, D.; Moreno, J.; Garcia-Guerra, A.
Source:
Reproduction, fertility, and development 2020 v.32 no.2 pp. 215-216
ISSN:
1031-3613
Subject:
heifers,   etc   ; Holstein; blastocyst; data collection; follicle-stimulating hormone; oocytes; ovarian follicles; pregnancy; statistical models;     Show all 9 Subjects
Abstract:
... The timing of initiation of superstimulatory treatments relative to follicle wave emergence has been shown to affect ovulatory response and invivo embryo production. The significant increase of invitro embryo production (IVP) and the possibility of using pregnant animals as oocyte donors has created the need to optimise superstimulatory treatments for IVP in pregnant cattle. Thus, the objective of ...
DOI:
10.1071/RDv32n2Ab176

14. Correction to: Characterization of functional traits with focus on udder health in heifers with divergent paternally inherited haplotypes on BTA18

Author:
Heimes, A.; Brodhagen, J.; Weikard, R.; Hammon, H. M.; Meyerholz, M. M.; Petzl, W.; Zerbe, H.; Engelmann, S.; Schmicke, M.; Hoedemaker, M.; Schuberth, H.-J.; Kühn, C.
Source:
BMC veterinary research 2019 v.15 no.1 pp. 285
ISSN:
1746-6148
Subject:
heifers,   etc   ; haplotypes; inheritance (genetics); udders; veterinary medicine;     Show all 5 Subjects
Abstract:
... The original article [1] contained an error whereby the captions to Figs 2 and 3 were mistakenly inverted; this has now been corrected. ...
DOI:
10.1186/s12917-019-2034-2
PubMed:
31395056
PubMed Central:
PMC6688331

15. Variations in follicle-diameter deviation and a growth spurt in the dominant follicle at deviation in Bos taurus heifers

Author:
Ginther, O.J.
Source:
Animal reproduction science 2018 v.188 pp. 155-164
ISSN:
0378-4320
Subject:
heifers,   etc   ; morphogenesis; ovarian follicles;     Show all 3 Subjects
Abstract:
... Follicle diameter deviation during a follicular wave in cattle is preceded by a common-growth phase and begins with continued growth rate of the future dominant follicle (DF or F1) and reduced growth rate of the future largest subordinate follicle (SF or F2). Follicle diameters were analyzed daily for wave 1 (n=100) and wave 2 (n=91). The beginning of expected deviation was designated day 0 and wa ...
DOI:
10.1016/j.anireprosci.2017.11.020

16. Ovarian follicular response to oestrous synchronisation and induction of ovulation in Norwegian Red cattle

Author:
Berg, Halldor Felde; Heringstad, Bjørg; Alm-Kristiansen, Anne Hege; Kvale, Vilde Granne; Dragset, Knut Ingolf; Waldmann, Andres; Ropstad, Erik; Kommisrud, Elisabeth
Source:
Acta veterinaria scandinavica 2020 v.62 no.1 pp. 16
ISSN:
1751-0147
Subject:
heifers,   etc   ; Norwegian Red; animal ovaries; artificial insemination; cows; estrus; gonadotropin-releasing hormone; herds; milk; ovulation; physical activity; progesterone; ultrasonography;     Show all 13 Subjects
Abstract:
... BACKGROUND: Oestrous synchronisation of cattle has been widely applied to accomplish simultaneous ovulation in animals and facilitate timed artificial insemination. The main aim of this study was to investigate the ovarian follicular growth and ovulatory response to oestrus and ovulation synchronisation in Norwegian Red heifers and cows. Oestrous cycles in 34 heifers and 10 cows from 4 herds were ...
DOI:
10.1186/s13028-020-00514-6
PubMed:
32164737
PubMed Central:
PMC7068941

17. Development of a novel 21-day reinsemination program, ReBreed21, in Bos indicus heifers

Author:
Andrade, João P.N.; Gomez-León, Victor E.; Andrade, Fabiana S.; Carvalho, Bruno P.; Lacouth, Karen L.; Garcia, Felipe Z.; Jacob, Júlio C.F.; Sales, José N.S.; Wiltbank, Milo C.; Mello, Marco R.B.
Source:
Theriogenology 2020 v.155 pp. 125-131
ISSN:
0093-691X
Subject:
heifers,   etc   ; Nellore; breeding season; cloprostenol; equine chorionic gonadotropin; estrus; gonadotropin-releasing hormone; ovulation; pregnancy; pregnancy diagnosis; ultrasonics; zebu;     Show all 12 Subjects
Abstract:
... The aim was to develop a program for resynchronization of ovulation (ReBreed21) that allowed reinsemination of non-pregnant Bos indicus heifers every 21 d using timed AI (TAI) without the need for detection of estrus. The Rebreed21 program begins 12 d after previous TAI (Day 0) by inserting an intravaginal P4 implant (Day 12) that is removed 7 d later (Day 19) combined with treatment with 300 IU o ...
DOI:
10.1016/j.theriogenology.2020.04.021

18. Measuring behavior patterns and evaluating time-sampling methodology to characterize brush use in weaned beef cattle

Author:
Horvath, K.C.; Toaff-Rosenstein, R.L.; Tucker, C.B.; Miller-Cushon, E.K.
Source:
Journal of dairy science 2020 v.103 no.9 pp. 8360-8368
ISSN:
0022-0302
Subject:
heifers,   etc   ; beef cattle; brushes; data collection; diurnal activity; diurnal variation; grooming (animal behavior); regression analysis; solar radiation; steers;     Show all 10 Subjects
Abstract:
... With growing interest in provision of brushes for cattle and the implications of brush use for behavioral development and welfare, there is a need to validate methodology for quantifying grooming behavior. Our objectives were to characterize patterns of brush use, including bouts, diurnal activity, and individual variability over 24-h periods, and to validate time-sampling methodologies to charact ...
DOI:
10.3168/jds.2020-18419

19. Applied use of interferon-tau stimulated genes expression in polymorphonuclear cells to detect pregnancy compared to other early predictors in beef cattle

Author:
Dalmaso de Melo, Gabriela; Mello, Barbara Piffero; Ferreira, Catia Aparecida; Souto Godoy Filho, Carlos Alberto; Rocha, Cecilia Constantino; Silva, Amanda Guimarães; Reese, Sydney Taylor; Madureira, Ed Hoffmann; Pohler, Ky Garrett; Pugliesi, Guilherme
Source:
Theriogenology 2020 v.152 pp. 94-105
ISSN:
0093-691X
Subject:
heifers,   etc   ; artificial insemination; beef cattle; blood; cows; false negative results; genes; glycoproteins; pregnancy; pregnancy diagnosis; progesterone; ultrasonography;     Show all 12 Subjects
Abstract:
... We aimed to evaluate the accuracy of Interferon-tau stimulated genes (ISG) abundance in peripheral blood polymorphonuclear cells (PMNs) on D20 after fixed-time artificial insemination (FTAI; D0) as a pregnancy diagnosis method against CL evaluation by Doppler ultrasonography and progesterone (P4) concentrations on D20, as well as Pregnancy Associated Glycoproteins (PAG) concentrations on D25. Addi ...
DOI:
10.1016/j.theriogenology.2020.04.001

20. Physical development, ease of integration into the dairy herd and performance of primiparous dairy cows reared with full whole-day, half-day or no mother-contact as calves

Author:
Zipp, Katharina A.; Knierim, Ute
Source:
The Journal of dairy research 2020 v.87 no.S1 pp. 154-156
ISSN:
1469-7629
Subject:
heifers,   etc   ; body weight; calves; calving; dairy cows; dairy herds; group housing; lactation duration; milk yield; rearing; weaning; withers;     Show all 12 Subjects
Abstract:
... We investigated whether different rearing conditions affected the physical development, ease of integration into the dairy herd and performance of primiparous dairy cows and the results are reported in this Research Communication. The three rearing conditions investigated were whole-day cow-calf contact for 9 weeks (WDC), half-day contact for nine weeks (HDC) and no mother-contact (NC) with nipple ...
DOI:
10.1017/S002202992000059X