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. 

330 Effect of inducing high or low progesterone concentrations during ovulatory follicle development on double ovulation and fertility of lactating dairy cows

2016 ◽  
Vol 94 (suppl_2) ◽  
pp. 155-155
Author(s):  
J. P. N. Martins ◽  
D. Wang ◽  
N. Mu ◽  
A. P. Martini ◽  
G. F. Rossi ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Follicle Development ◽  
Lactating Dairy Cows ◽  
Ovulatory Follicle

scholarly journals Level of circulating concentrations of progesterone during ovulatory follicle development affects timing of pregnancy loss in lactating dairy cows

2018 ◽  
Vol 101 (11) ◽  
pp. 10505-10525 ◽  
Author(s):  
J.P.N. Martins ◽  
D. Wang ◽  
N. Mu ◽  
G.F. Rossi ◽  
A.P. Martini ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Pregnancy Loss ◽  
Follicle Development ◽  
Lactating Dairy Cows ◽  
Ovulatory Follicle

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 < 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 < 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 < 0.01) between FOL (35.9 ± 3.8 mm) and LUT (34.5 ± 3.4mm), VER has a significant relation (P < 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.

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

Effect of injection of β-carotene or vitamin E and selenium on fertility of lactating dairy cows

1998 ◽  
Vol 50 (1) ◽  
pp. 65-76 ◽  
Author(s):  
C.F Aréchiga ◽  
S Vázquez-Flores ◽  
O Ortiz ◽  
J Hernández-Cerón ◽  
A Porras ◽  
...  
Keyword(s):  
Vitamin E ◽  
Dairy Cows ◽  
Lactating Dairy Cows ◽  
Β Carotene

Effect of sequential treatment with prostaglandin F2 alpha and/or oxytocin on estrus and pregnancy rate of lactating dairy cows

1994 ◽  
Vol 42 (5) ◽  
pp. 773-780 ◽  
Author(s):  
L.F. Archbald ◽  
S. Constant ◽  
T. Tran ◽  
C. Risco ◽  
E. Klapstein ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Sequential Treatment ◽  
Prostaglandin F2 Alpha ◽  
Lactating Dairy Cows

Follicular dynamics, corpus luteum growth and regression in lactating dairy cattle

1991 ◽  
Vol 71 (1) ◽  
pp. 61-68 ◽  
Author(s):  
C. Taylor ◽  
R. Rajamahendran
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Estrous Cycle ◽  
Follicular Growth ◽  
Dominant Follicle ◽  
Lactating Dairy Cows ◽  
Ovulatory Follicle ◽  
Second Wave ◽  
Lactating Dairy Cattle ◽  
Follicular Dynamics

Ultrasound imaging and progesterone (P4) profiles were used to characterize follicular and corpus luteum (CL) growth and regression in 10 cycling dairy cows. Thirteen of sixteen cycles were characterized by two waves of follicular growth, the second wave giving rise to the ovulatory follicle. The remaining three cycles had three waves. There was no difference between two- and three-wave cycles with regard to the day of emergence of the first or second dominant follicle (day 2.5 ± 0.9 vs. day 2.4 ± 1.2 and day 12.4 ± 1.6 vs. day 12.0 ± 2.0, respectively) or the onset of regression of the first dominant follicle (day 12.5 ± 1.5 vs. day 12.3 ± 1.5). In two wave cycles, estrous cycle length was shorter (20.8 ± 1.7 d vs. 29.7 ± 4.9 d), the first day of decline in P4 (day 16.2 ± 1.5 vs. day 23.7 ± 5.5) and the onset of CL regression (day 17.1 ± 1.3 vs. day 24.3 ± 5.5) was earlier. It is concluded that two waves of follicular growth in an estrous cycle is the norm in lactating dairy cows. The presence of an additional wave is due to a prolonged luteal phase. Key words: Follicle, corpus luteum, estrous cycle, dairy cow

Impact of circulating concentrations of progesterone and antral age of the ovulatory follicle on fertility of high-producing lactating dairy cows

2012 ◽  
Vol 24 (1) ◽  
pp. 267 ◽  
Author(s):  
J. Richard Pursley ◽  
Joäo Paulo N. Martins
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Gonadotropin Releasing Hormone ◽  
Oestrous Cycle ◽  
Dairy Production ◽  
Management Issue ◽  
Lactating Dairy Cows ◽  
Ovulatory Follicle ◽  
The World ◽  
Conception Rates

Dairy cow infertility negatively affects profit of dairy production enterprises around the world, and enhancing conception rates of dairy cows is a critical management issue to resolve. It appears that conception rates of dairy cows are attenuated due to reduced progesterone concentrations in circulation during growth of the ovulatory follicle. It is not clear how reduced progesterone influences fertility, but data presented in this brief review suggest that it can be somewhat reversed through increasing concentrations of progesterone during the growth of the ovulatory follicle before luteolysis. Ovsynch protocols may be utilised to enhance progesterone concentrations through the induction of an accessory corpus luteum (CL) following the initial gonadotropin-releasing hormone (GnRH) treatment. Cows at Day 13 of the oestrous cycle with a 7-day-old accessory CL had ~50% more progesterone at the time of prostaglandin injection of Ovsynch compared with cows with only a Day 13 CL. Ovsynch can consistently induce an accessory CL following the initial GnRH treatment if cows are on Days 6 or 7 of the oestrous cycle at the time of treatment. Pre-synchrony strategies are critical to enhance the probability that cows will be on Days 6 or 7 at first GnRH treatement of Ovsynch.

scholarly journals The effect of ovulatory follicle size at the time of insemination onpregnancy rate in lactating dairy cows

2016 ◽  
Vol 40 ◽  
pp. 68-74 ◽  
Author(s):  
Abdulkadir KESKİN ◽  
Gülnaz MECİTOĞLU ◽  
Ebru BİLEN ◽  
Barış GÜNER ◽  
Abdulkadir ORMAN ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Lactating Dairy Cows ◽  
Ovulatory Follicle ◽  
Follicle Size
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