scholarly journals Potential of an activity index combining acceleration and location for automated estrus detection in dairy cows

2021 ◽  
Author(s):  
Jun Wang ◽  
Yadan Zhang ◽  
Matt Bell ◽  
Gang Liu
Keyword(s):  
Dairy Cows ◽  
Activity Index ◽  
Estrus Detection

scholarly journals Effects of management and health on the use of activity monitoring for estrus detection in dairy cows

2012 ◽  
Vol 95 (5) ◽  
pp. 2452-2466 ◽  
Author(s):  
S.P.M. Aungier ◽  
J.F. Roche ◽  
M. Sheehy ◽  
M.A. Crowe
Keyword(s):  
Dairy Cows ◽  
Activity Monitoring ◽  
Estrus Detection

Effects of Beta-carotene Administration on Fertility in Lactating Dairy Cows

2021 ◽  
Author(s):  
Ebru Karakaya Bilen ◽  
Gülnaz Yılmazbaş Mecitoglu
Keyword(s):  
Dairy Cows ◽  
Detection Rate ◽  
Beta Carotene ◽  
Prostaglandin F2 Alpha ◽  
Lactating Dairy Cows ◽  
Follicle Diameter ◽  
Ovulatory Follicle ◽  
Estrus Detection ◽  
Potential Benefits ◽  
Β Carotene

Background: Beta-(β-) carotene, is the precursor to vitamin A, in particular, has some potential benefits on reproduction. The main objective of this study was to investigate the efficacy of β-carotene administration on fertility following either prostaglandin F2 alpha (PGF) induced estrus or Ovsynch protocol in lactating dairy cows.Methods: Cows with at 47±3 postpartum days were divided into two groups: β-carotene group (βC, n=139) was treated with injectable β-carotene while untreated cows served as control (CON, n=227). In both groups, PGF was administered and heatmount detectors were applied at 54±3 days postpartum. Cows detected in estrus after PGF were inseminated. Cows that had not been detected in estrus were divided into two groups 7 days after PGF administration; βC-OVS (n=137) and CON-OVS (n=89). Ovsynch protocol was initiated 4 days after β-carotene administration.Result: The estrus detection rate was similar between the βC and CON groups (P = 0.19). Pregnancy per AI (P/AI) on d 31 was also similar between groups (P = 0.93). In the Ovsynch protocol, ovulation to the first GnRH and ovulatory follicle diameter at the time of insemination did not differ between groups. No difference was observed in P/AI at d 31 (P = 0.13). The results of this study indicated that β-carotene administration had no effect on fertility either PGF induced estrus or Ovsynch protocol in dairy cows. 

43 COSTS RELATED TO ESTRUS SYNCHRONIZATION AND AI PROTOCOLS IN CROSSBRED HOLSTEIN-ZEBU DAIRY COWS

2010 ◽  
Vol 22 (1) ◽  
pp. 179
Author(s):  
L. D. P. Sinedino ◽  
B. T. Gerhardt ◽  
A. P. Dourado ◽  
L. A. G. Nogueira
Keyword(s):  
New York ◽  
Dairy Cows ◽  
Pregnancy Rate ◽  
Animal Health ◽  
Cost Benefit ◽  
Estradiol Benzoate ◽  
Estrus Synchronization ◽  
Labor Costs ◽  
Estrus Detection ◽  
The Cost

The objective of this paper was to compare 3 bovine AI protocols, evaluating the cost of each treatment and the pregnancy rates obtained, to demonstrate the importance of routine utilization of estrus synchronization techniques. The experiment was conducted in the Farm School of Cachoeiras de Macacu of the Federal Fluminense University, in the state of Rio de Janeiro, during the period from 2006 to 2007 (August to June). One hundred sixteen crossbred female Holstein-Zebu dairy cows in cycle, with body condition between 2.5 to 4 (on a scale from 1 to 5), were selected and divided randomly in 3 groups (G). Animals in G1 [n = 60; 21 heifers (H), 13 primiparous (P), and 26 multiparous (M)], with palpable corpus luteum, received 25 mg of prostaglandin F2 intravulvar, and AI was done 12 h after estrus detection. For animals in G2 (n = 30; 11 H, 6 P, and 13 M) an intravaginal progesterone device (CIDR®, Pfizer Animal Health, New York, NY, USA) was inserted and 2 mg of estradiol benzoate (EB) was administered i.m. on Day 0. On Day 8 the device was removed and 25 mg of prostaglandin was administered i.m. on Day 9, 2 mg of EB was administered, and 30 h later, timed AI of all animals was performed. For G3 (n = 26; 9 H, 5 P, and 12 M), the protocol used was similar to that for G2, except that on Day 8 400 IU of eCG was administered (in addition to the removal of the device) and on Day 9 the dose of EB was reduced to 1 mg and timed AI was done 27 h later. AI was done with semen from 2 sires with proven fertility, by the same technician. The pregnancy diagnoses were done on Day 45 by palpation per rectum and transrectal ultrasonography. The cost-benefit relation was calculated according to the cost of pharmaceuticals multiplied by the number of animals in each experimental group divided by the number of pregnancies obtained in each one, without considering the manual labor costs in all the groups and considering 3 uses of the CIDR. The statistical analyses were done using chi-square test. The pregnancy rate obtained in G2 (60%, 18/30) was superior to that in G1 (30%, 18/60) (P < 0.05), demonstrating the efficiency of the treatment that utilized progesterone. G3 (53.85%, 14/26) was similar (P > 0.05) to G2, despite the fact that the eCG was added in this group. In reference to cost-benefit, considering only the pharmaceuticals costs and the value for pregnancy obtained in each group, the costs found, respectively, were G1 U$7.02 and U$23.66; G2 U$28.57 and U$47.59; and G3 U$47.96 and U$89.05. The lowest cost in the estrus synchronization was based on the use of prostaglandins alone; the use of progesterone increased the synchronization cost, but also increased the pregnancy rate and eliminated the need for estrus observation. The addition of eCG in cows that are cycling does not necessarily demand a increase in pregnancy rate. Failure in estrus detection, using prostaglandin alone, increased the interval from calving, causing a daily loss in milk production, which justified the investment in protocols of estrus and ovulation synchronization, contributing to increase the reproductive efficiency of a dairy cow herd.

scholarly journals 300 Efficacy of the measurements of the vaginal electrical resistance to determine the phase of the estrous cycle in lactating dairy cattle

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 138-138
Author(s):  
Martin G Maquivar ◽  
John Swain ◽  
Hannah Chiapetta ◽  
Tynnetta Stumvoll ◽  
Katelin Baker ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Estrous Cycle ◽  
Electrical Resistance ◽  
Luteal Phase ◽  
Economic Loss ◽  
Estrous Cycles ◽  
Follicle Diameter ◽  
Estrus Detection ◽  
Vaginal Temperature

Abstract Estrus detection in dairy cattle is an important factor that contributes to the reproductive efficiency. Lack and inaccuracy of heat detection are associated with increased days open, calving interval, economic loss and culling due to infertility. Efforts have been made to identify methods to assist in estrus detection. The objective of this study was to examine if vaginal electrical resistance (VER) measured by a commercial probe throughout the estrous cycle in lactating dairy cows aids to determine the onset of estrus. A total of 9 lactating Holstein cows were monitored for 2 – 3 estrous cycles, ultrasonography of the ovary, blood sample for progesterone and VER was assessed every other day during the luteal phase (LUT) and every day during the follicular phase (FOL). A total of 339 VER measurements were collected, 66 during the FOL phase and 273 corresponded to the LUT phase. Mean VER differed (P &lt; 0.001) between FOL (294.5 ± 51.3) and LUT (316.4 ± 46.2), similarly the progesterone concentration was different between the LUT and FOL phases (0.38 ± 0.24 ng/mL vs. 3.41 ± 2.08 ng/mL, respectively) (P &lt; 0.001). No differences were observed between the vaginal temperature of cows in LUT (38.2 ± 0.4 C°) or FOL phase (38.3 ± 0.3 C°). Cervix diameter differed (P &lt; 0.01) between FOL (35.9 ± 3.8 mm) and LUT (34.5 ± 3.4mm), VER has a significant relation (P &lt; 0.001) with the diameter of the Corpus luteum (279.8 + 1.54 x Cervix diameter). Similarly, VER had a significant relationship (P = 0.03) with diameter of the dominant follicle at estrus (355.2 + -3.9 x follicle diameter). These findings suggest that VER changes according to the phase of the estrous cycle, VER decreased during sexual receptivity and increased during the luteal phase. VER may improve the accuracy to diagnose heat in dairy cows.

Application of an Automated Estrus Detection System for Dairy Cows in Taiwan

2001 ◽  
Author(s):  
Yu-Yao Hu ◽  
Chu-Yang Chou ◽  
Yan-Nian Jiang ◽  
Chih-Hua Wang
Keyword(s):  
Dairy Cows ◽  
Detection System ◽  
Estrus Detection

Use of sex-sorted sperm in lactating dairy cows upon estrus detection or following timed artificial insemination

2013 ◽  
Vol 143 (1-4) ◽  
pp. 19-23 ◽  
Author(s):  
M.F. Sá Filho ◽  
M.F. Mendanha ◽  
R.V. Sala ◽  
F.J. Carvalho ◽  
L.H.C. Guimarães ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Artificial Insemination ◽  
Lactating Dairy Cows ◽  
Estrus Detection ◽  
Timed Artificial Insemination

Can video cameras replace visual estrus detection in dairy cows?

2012 ◽  
Vol 77 (3) ◽  
pp. 525-530 ◽  
Author(s):  
P. Bruyère ◽  
T. Hétreau ◽  
C. Ponsart ◽  
J. Gatien ◽  
S. Buff ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Video Cameras ◽  
Estrus Detection

scholarly journals Effect of two prostaglandin injections on days 5 and 6 in a timed AI protocol after estrus expression on pregnancy outcomes in dairy cows during cold or hot seasons of the year

2019 ◽  
Vol 62 (1) ◽  
pp. 161-170
Author(s):  
Mufeed A. Alnimer ◽  
Mohamed A. Abedal-Majed ◽  
Ahmad I. Shamoun
Keyword(s):  
Dairy Cows ◽  
Artificial Insemination ◽  
Pregnancy Outcomes ◽  
Dairy Herd ◽  
Control Treatment ◽  
Estrus Detection ◽  
Timed Artificial Insemination ◽  
Observation Period ◽  
Synchronization Protocol ◽  
Voluntary Waiting Period

Abstract. The objective of this study was to test whether prostaglandin (PG) injection on day 30 postpartum (pp) and detection of estrus can affect the efficacy of injecting PG on days 5 and 6 in the timed artificial insemination (TAI) protocol on pregnancy rate in a large dairy herd in hot or cold seasons. Out of 2235 cows, 1998 received an injection of PG at 30±3 d pp and estrus was observed. Cows that displayed estrus during the estrous observation period after PG injection were classified as estrus (E), while those that did not show estrus were classified as nonestrus (NE). Cows in each group were assigned to two treatments: CO-72 (control treatment) (ECO-72 and NECO-72) (day 44 GnRH, day 51 PGF2α, day 54 GnRH+TAI) or PG–PG (EPG–PG and NEPG–PG) (day 44 GnRH, day 49 PGF2α, day 50 PGF2α, day 52 GnRH+TAI). Pregnancy was diagnosed on days 33 and 47 after artificial insemination (AI). The proportion of cows in estrus on the day of TAI was higher (P≤0.05) for cows that received two PG than for cows that received one PG. Pregnancies per AI (P/AI) on days 33 and 47 for cows inseminated during and after a voluntary waiting period in the NEPG–PG treatment had higher rates than for cows in the EPG–PG, ECO-72 and NECO-72 treatments. Moreover, P/AI were significantly (P≤0.05) affected by parity. Primiparous had higher P/AI (37.0 %) than multiparous cows (31.6 %). Cows inseminated in cold months had higher P/AI and reduced PL (35.6 % and 20.8 %) than cows inseminated in hot months (29.1 % and 30.6 %, respectively). In conclusion, treatments with PG on days 5 and 6 after the first GnRH injection increased P/AI. Estrus detection before the beginning of TAI protocol did not affect fertility. To maximize P/AI cows exhibiting heat at any time during the synchronization protocol should be inseminated.

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