scholarly journals Effect of Buserelin on corpus luteum activity and the fertility of dairy cows

2018 ◽  
Vol 49 (1) ◽  
pp. 34 ◽  
Author(s):  
Ph. SARATSIS (Φ. ΣΑΡΑΤΣΗΣ) ◽  
B. SCHMIDT-ADAMOPOULOU (Β. SCHMIDT-ΑΔΑΜΟΠΟΥΛΟΥ) ◽  
P. YPSILANTIS (Π. ΥΨΗΛΑΝΤΗΣ) ◽  
Ch. BROZOS (Χ. ΜΠΡΟΖΟΣ) ◽  
A. DEMERTZIS (Α. ΔΕΜΕΡΤΖΗΣ)
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Pregnancy Rate ◽  
Estrous Cycle ◽  
Normal Saline ◽  
Progesterone Concentration ◽  
Group A ◽  
Maternal Recognition Of Pregnancy ◽  
In Pregnancy

112 selected Friesian dairy cows that had calved at least once, were used. The animals were divided into two groups, A (n = 55) and Β (n=57). On the 12th day post insemination (p.i.) 12 μg buserelin (3ml Receptal - Hoechst) and 3 ml normal saline (placebo) were injected intramuscularly to the animals of groups A and Β (controls), respectively. Milk progesterone concentration was measured in even animal from the day of insemination until the 24th day p.i.. A significant increase (P<0.05) in pregnancy rate (19.7%) was observed in the animals of group A. Also, the concentration of progesterone in the pregnant animals (14th - 24th day p.i.) as well as in the non pregnant (14th - 16th day p.i.) ones in group A was significantly increased (P<0.05) compared to that of the controls'. The duration of the estrous cycle of the non pregnant animals did not differ significantly (P>0.05) between the two groups. It is concluded that buserelin administration on the 12th day p.i. improved the fertility of dairy cows significantly by means of an antiluteolytic effect, through an increase in progesterone concentration, during the crucial period of maternal recognition of pregnancy.

scholarly journals Gene Expressions in the Persistent Corpus Luteum of Postpartum Dairy Cows: Distinct Profiles from the Corpora Lutea of the Estrous Cycle and Pregnancy

2012 ◽  
Vol 58 (4) ◽  
pp. 445-452 ◽  
Author(s):  
Fumie MAGATA ◽  
Koumei SHIRASUNA ◽  
Klaas STR^|^Uuml;VE ◽  
Kathrin HERZOG ◽  
Takashi SHIMIZU ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Estrous Cycle ◽  
Corpora Lutea ◽  
Gene Expressions

scholarly journals Determination of progesterone concentration during the estrous cycle in dairy cows using a chemiluminescence assay

2018 ◽  
Vol 16 ◽  
pp. 1
Author(s):  
Luiz Ernandes Kozicki ◽  
Saulo Henrique Weber ◽  
Louise Helene Bacher ◽  
Isabella Sellmer Ramos ◽  
Francisco Romano Gaievski ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Estrous Cycle ◽  
Progesterone Concentration ◽  
Chemiluminescence Assay

scholarly journals 141 Effect of induction of an ipsilateral vs. contralateral accessory corpus luteum (CL) on pregnancy per AI and pregnancy loss in lactating dairy cows

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 113-114
Author(s):  
Pedro L J Monteiro ◽  
Caio A Gamarra ◽  
Rodrigo S Genari ◽  
Alexandre B Prata ◽  
Rafael V Barletta ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Pregnancy Loss ◽  
Statistical Analyses ◽  
Holstein Cows ◽  
Crown Rump Length ◽  
Blood Samples ◽  
Vesicle Size ◽  
Lactating Dairy Cows ◽  
In Pregnancy

Abstract Induction of accessory CL can increase circulating progesterone (P4) and potentially improve fertility; although, regression of accessory CL contralateral to the pregnancy can occur, potentially negating their benefit. In this study, primiparous (n = 377) and multiparous (n = 678) lactating Holstein cows (80.0 ± 3.3DIM, 43.2 ± 13.3 kg milk/d, and BCS = 2.85 ± 0.24) were enrolled in Presynch-Ovsynch (PGF-14d-PGF-12d-GnRH-7d-PGF-56h-GnRH-16h-AI) with AI at 81 ± 3 DIM. On d5 after AI, cows were randomly but unequally assigned as Control (n = 289) or GnRH (n = 641; 100 µg gonadorelin acetate). Blood samples were collected for P4 and ovaries evaluated by ultrasound on d5, d12, d19, d26, d33, d47, and d61. mRNA for ISGs (d19) and PSPB (d26) concentrations were evaluated and pregnancy diagnoses were done on d26, d33, d47 (also embryonic measurements), and d61. Statistical analyses were performed with PROC GLIMMIX of SAS 9.4. Ovulation to GnRH on d5 was 85.4% (577/676). Cows were designated as: Control (n = 289), Ipsilateral (n = 239), or Contralateral (n = 241). Overall P4 differed (P &lt; 0.01) within groups (Control = 7.90 ± 0.35c, Ipsilateral = 10.5 ± 0.34a, and Contralateral = 9.55 ± 0.26a). Interestingly, 52.7% (78/148) of contralateral pregnant cows had accessory CL regression by d61 with decreases in P4 after contralateral CL regression (P &lt; 0.001). There were no treatment differences for pregnant cows in ISG15 (P = 0.63) or Mx2 (P = 0.51) mRNA, circulating PSPB (P = 0.56), amniotic vesicle size (P = 0.89), or crown-rump length (P = 0.19) or in pregnancy/AI on d26 (P = 0.24), d33 (P = 0.67), d47 (P = 0.53), or d61 (P = 0.62; overall 50.3% [387/769]). Nevertheless, pregnancy losses between d26 and d61 were lower (P = 0.03) for ipsilateral (6.6 ± 2.3%) than contralateral (14.0 ± 3.0%) and from controls (P = 0.065; 13.7 ± 2.9%) With differences also from d26-33 (Control = 7.5 ± 2.1; Ipsilateral = 3.1 ± 1.5; Contralateral = 9.6 ± 2.5). Within contralateral group, early accessory CL regression was associated with greater pregnancy loss from d26-33 (P = 0.04) and d26-61 (P = 0.01). Thus, induction of accessory CL increases P4 and may reduce pregnancy loss, although these advantages are reduced for contralateral accessory CL, because many of these CL regress during pregnancy.

scholarly journals Effect of hCG application at different moments of the estrous cycle on corpus luteum and uterine vascularization and serum progesterone concentration in mares

2019 ◽  
Vol 16 (2) ◽  
pp. 317-327
Author(s):  
Maria Augusta Alonso ◽  
Luciano Andrade Silva ◽  
Fernanda Jordão Affonso ◽  
Kleber Menegon Lemes ◽  
Eneiva Carla Carvalho Celeghini ◽  
...  
Keyword(s):  
Corpus Luteum ◽  
Estrous Cycle ◽  
Progesterone Concentration ◽  
Serum Progesterone

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

The effect of palm oil fatty acids on cervix regression in dairy cows during the first 40 days postpartum

2007 ◽  
Vol 2007 ◽  
pp. 147-147
Author(s):  
A. Heravi Moussavi ◽  
M. Danesh Mesgaran
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Pregnancy Rate ◽  
Palm Oil ◽  
Human Hand ◽  
Ultrasonic Technique ◽  
Exact Data ◽  
In Pregnancy ◽  
Holstein Dairy Cows

An undisturbed re-organisation of the cervix postpartum is a basic pre-condition for an undisturbed puerperium (Wehrend et al., 2003). This aspect of the puerperal involution has been insufficiently considered in the literature. It was shown that some cows developed a disorder of the cervical involution (Wehrend and Bostedt, 2003). LeBlank et al. (2002) concluded that the size of cervix in cows with clinical endometritis were associated with a decrease in pregnancy rate. With the use of the ultrasonic technique instead of using fingers of the human hand, more exact data on cervix regression can be delivered. Meanwhile, little is known about the effect of diet on cervix regression after parturition. The objective of this study was to evaluate the effect of palm oil fatty acids on cervix regression during the first 40 days postpartum in Iranian Holstein dairy cows using ultrasonic technique.

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