scholarly journals Preovulatory follicle characteristics and oocyte competence in repeat breeder dairy cows

2017 ◽  
Vol 100 (11) ◽  
pp. 9372-9381 ◽  
Author(s):  
P. Sood ◽  
M. Zachut ◽  
I. Dekel ◽  
H. Dube ◽  
S. Jacoby ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Preovulatory Follicle ◽  
Oocyte Competence ◽  
Repeat Breeder

scholarly journals Behavioral and hormonal pattern of repeat breeder cows around estrus

Reproduction ◽  
2015 ◽  
Vol 149 (6) ◽  
pp. 545-554 ◽  
Author(s):  
P Sood ◽  
M Zachut ◽  
H Dube ◽  
U Moallem
Keyword(s):  
Preovulatory Follicle ◽  
Oocyte Competence ◽  
Plasma Estradiol ◽  
Follicle Size ◽  
Lh Secretion ◽  
Estradiol Concentration ◽  
Repeat Breeder

Repeat breeder (RB) cows were compared with normal (CTRL) ones with respect to behavioral estrus intensity, endocrine patterns and concentrations of plasma estradiol, progesterone and LH around estrus, and ovulation timing. A total of 27 and 31 cycles in 12 RB and 18 CTRL cows, respectively, were synchronized by means of the Ovsynch protocol followed by a single PG injection after 7 days. Behavioral estrus and ovulation were observed in 81.5 and 83.8% of the synchronized cycles in the RB and CTRL cows respectively. The RB and CTRL groups had similar estrus durations of 21.4 and 19.6 h respectively, but estrus was more intense in the RB, as indicated by numerically higher overall activity indexes and higher peak neck activity. The interval from PG injection to estrus onset (considered as proestrus) was 8.2 h shorter in RB than in CTRL cows, at 47.9 and 56.1 h respectively (P<0.007), but the average preovulatory follicle size was similar. The estradiol concentration at peak was numerically higher (21%) and the AUC tended to be higher in the RB cows than in the CTRL cows. LH secretion during the period from 18 to 3 h before the LH peak was also lower in RB than in CTRL cows: 2.5 and 4.6 ng/ml respectively (P<0.01). In conclusion, the behavioral estrus was more intense in the RB cows; nevertheless, short proestrus and subdued LH concentrations before the LH peak, which could impair oocyte competence and development, were first reported in RB cows.

scholarly journals Endometrial Inflammation at the Time of Insemination and Its Effect on Subsequent Fertility of Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1858
Author(s):  
Karen Wagener ◽  
Marc Drillich ◽  
Christine Aurich ◽  
Christoph Gabler
Keyword(s):  
Immune Response ◽  
Dairy Cows ◽  
Mrna Expression ◽  
Reverse Transcription ◽  
Artificial Insemination ◽  
Cox Regression ◽  
Related Factor ◽  
Subsequent Fertility ◽  
Cxcl8 Mrna ◽  
Repeat Breeder

Our objective was to investigate the level of endometrial immune response at artificial insemination (AI) and to relate it to subsequent fertility. From 71 healthy cows, endometrial cytobrush samples were taken at the first AI for cytological and mRNA analyses. Total RNA isolated from the cytobrushes was used for reverse transcription qPCR for selected transcripts. Animals were grouped into pregnant (PREG; n = 32) and non-pregnant (non-PREG; n = 39) cows following their first AI. The mRNA abundance of the neutrophil-related factor CEACAM1 and the chemokine CXCL5 was 1.2- (p = 0.03) and 2.0-fold (p = 0.04) greater in PREG than in non-PREG cows, respectively. Animals were further subdivided according to the number of inseminations until pregnancy (PREG1, n = 32; PREG2-3, n = 19) and in repeat breeder cows (RBC, n = 13). CEACAM1 and CXCL8 mRNA expression was 1.7- (p = 0.01) and 2.3-fold (p = 0.03) greater in PREG1 than in RBC, respectively. Cox regression showed that cows with PMN ≥ 1% had a 1.8-fold increased chance of pregnancy within 150 days postpartum compared with cows with fewer PMNs. We conclude that a certain level of inflammation before the stimulus of AI might be beneficial for subsequent fertility.

scholarly journals Embryo transfer as an option to improve fertility in repeat breeder dairy cows

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Arkadiusz Nowicki
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Embryo Transfer ◽  
Oocyte Quality ◽  
Poor Quality ◽  
Early Embryo ◽  
Reproductive Disorder ◽  
Uterine Environment ◽  
Repeat Breeder

Abstract Repeat breeding is a serious reproductive disorder in dairy cattle. The causes of repeat breeding are multifactorial and there are two main mechanisms: failure of fertilisation or early embryo death, mainly due to poor quality of oocytes and an inadequate uterine environment. Many methods have been used to increase the pregnancy rate for repeat breeder cows, such as intrauterine infusion of antibacterial agents or antibiotics, hormonal treatments for oestrus synchronisation and induction of ovulation, and progesterone supplementation or induction of accessory corpus luteum; however, the results were inconsistent between studies. Embryo transfer (ET) has the capability to minimalise the effects of poor oocyte quality and unfavourable uterine environments on early embryo development during the first seven days after ovulation in repeat breeder cows, and several studies showed that ET significantly improved the pregnancy rate in this group of animals. Thus, ET can be considered an option to increase the conception rate in repeat breeder dairy cows.

scholarly journals Hormonal Profile Study of Bangladeshi Crossbred Dairy Cows in Relation to Repeat Breeding

2020 ◽  
Vol 8 (3) ◽  
pp. 100-103
Keyword(s):  
Luteinizing Hormone ◽  
Dairy Cows ◽  
Follicle Stimulating Hormone ◽  
Economic Loss ◽  
Normal Functioning ◽  
Normal Cycle ◽  
Hormonal Profile ◽  
Breeding Condition ◽  
Profile Study ◽  
Repeat Breeder

The repeat breeding condition affects both the fertility of cows and the economy of farmers and the nation. Normal levels of various biochemical constituents are indispensable for the normal functioning of various body systems of animals, including the reproductive system. The hormonal profile is an indicator of the reproductive status and aids in the prognosis and restoration of animal fertility. The present study explores the implication of four hormones (luteinizing hormone, follicle-stimulating hormone, human chorionic gonadotropin and prolactin) on the normal cycle breeding process of Bangladeshi normal cyclic cows and repeat breeder dairy cows. Among four hormones, the levels of luteinizing hormone and prolactin were significantly different between the normal cyclic cows and repeat breeder cows. The assessment of hormonal profile aids in ameliorating the repeat breeding conditions of the dairy cows. The findings of the present study could be applied in overcoming repeat breeding problems in dairy cows and thus, economic loss could be lessened.

scholarly journals Effect of GnRH on 5th Day of Post Artificial Insemination for Fertility Augmentation in Repeat Breeder Dairy Cows

2018 ◽  
Vol 7 (10) ◽  
pp. 466-468
Author(s):  
C.K. Lakde ◽  
S.K. Sahatpure ◽  
S.K. Sheetal ◽  
A.D. Patil ◽  
S.V. Upadhye ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Artificial Insemination ◽  
Repeat Breeder

scholarly journals Prostaglandin F2? as ovulatory stimulus in dairy cows and buffaloes raised in the Amazon biome

2021 ◽  
Vol 42 (1) ◽  
pp. 193-208
Author(s):  
Luiz Francisco Pfeifer ◽  
◽  
Natália Castro ◽  
Jamyle Pereira ◽  
Augusto Schneider ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Single Point ◽  
Estradiol Benzoate ◽  
Preovulatory Follicle ◽  
Chi Square ◽  
Lactating Dairy Cows ◽  
Chi Square Test ◽  
The Moment ◽  
Dichotomous Outcomes ◽  
To Receive

This study evaluated the effect of a prostaglandin F2? (PGF) analogue as an ovulatory stimulus in dairy cows and buffaloes raised in the Amazon biome. To this end, three experiments were performed in the state of Rondônia, located in the Amazon biome. In Experiment 1, 22 lactating dairy buffaloes received 2 mg of intramuscular (I.M.) estradiol benzoate (EB) on day 0 and an intravaginal progesterone-releasing device (CIDR) from day 0 to day 9 of the protocol. On days 8 and 9, all cows were given 500 ?g of I.M. d-cloprostenol (PGF analogue). On day 10, buffaloes were divided into two groups to receive 500 ?g of PGF (PGF group, n = 8) or no treatment (CTL group, n = 14), respectively. In Experiment 2, 16 lactating crossbred dairy cows (Holstein x Gir) received 2 mg of EB on day 0 and a CIDR insert from day 0 to day 8. On days 7 and 8, all cows were given 500 ?g of d-cloprostenol. On day 9, cows were divided into two groups to receive 500 ?g of d-cloprostenol (PGF group, n = 8) or no treatment (CTL group, n = 8), respectively. In Experiment 3, 16 lactating crossbred dairy cows (Holstein x Gir) were handled and treated similarly as in Experiment 2, although cows did not receive d-cloprostenol on day 8. Single-point outcome variables were analyzed using one-way analysis of variance (ANOVA), while proportions with dichotomous outcomes were analyzed with the chi-square test. In Experiment 1, there was no difference (P = 0.30) in the ovulation rate between groups, and, on average, 68% of the buffaloes ovulated. Moreover, the treatment did not affect the interval to ovulation (P = 0.61) nor the diameter of the preovulatory follicle (P = 0.47). As for Experiment 2, only one cow, from the PG group, did not ovulate. There were no differences between the CTL and PG groups (P = 0.69) in the moment of ovulation, which occurred in average 82 h after CIDR removal. Finally, in Experiment 3, cows treated with PGF ovulated earlier than those in the CTL group (62.5 ± 5.8 and 94.5 ± 13.5 h, respectively; P = 0.05). Collectively, these results suggest that PGF hastens ovulation in lactating dairy cows, whereas no effect was observed in dairy buffaloes.

scholarly journals A clinical study for use of some reproductive programs in repeat-breeder dairy cows

2012 ◽  
Vol 26 (Suppl. III) ◽  
pp. 275-281
Author(s):  
A.H.J. Al-Bdeery ◽  
D.H.J. Al-Delemy
Keyword(s):  
Clinical Study ◽  
Dairy Cows ◽  
Repeat Breeder

scholarly journals Seroprevalence of Neospora caninum in repeat breeder dairy cows in Turkey* (short communication)

2008 ◽  
Vol 51 (2) ◽  
pp. 143-148 ◽  
Author(s):  
S. Simsek ◽  
A. E. Utuk ◽  
E. Koroglu ◽  
N. Dumanli ◽  
A. Risvanli
Keyword(s):  
Dairy Cows ◽  
Immunosorbent Assay ◽  
Significant Relationship ◽  
Short Communication ◽  
Neospora Caninum ◽  
Age Groups ◽  
Enzyme Linked Immunosorbent Assay ◽  
Caninum Antibody ◽  
Sera Samples ◽  
Repeat Breeder

Abstract. Sera samples from 89 dairy cows with repeat breeder and 94 healthy pregnant dairy cows (controls) from Elazig province of eastern Turkey were tested for presence of Neospora caninum antibodies by use of a competitive enzyme linked immunosorbent assay (cELISA). Fifteen out of 183 cows tested (8.19%) were found to be seropositive to N. caninum antibody. Overall, seroprevalence of N. caninum was significantly higher (P<0.05) in dairy cows with repeat breeder (13.48%, 12/89) than in dairy cows with healthy pregnant (3.19%, 3/94). There was no statistically significant relationship between seroprevalence and breed and age groups in cows with repeat breeder (P>0.05). In conclusion, the current study highlights the importance of N. caninum in cows with repeat breeder.

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