Physical properties of bovine cervical mucus during normal and induced (progesterone and/or PGF2α) estrus

Tsiligianni, Theodora; Karagiannidis, A.; Brikas, P.; Saratsis, Ph.

doi:10.1016/s0093-691x(01)00431-9

Cited by 31 publications

(25 citation statements)

References 25 publications

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“…The results suggest that if this working protocol is adopted, the reproductive efficiency can be improved even in herds that use visual observation to detect oestrus. Although physical differences in cervical mucus quality are not believed to directly affect fertility (Tsiligianni et al, 2001), the results suggest that abundant, clear mucus may serve as an indicator of oestrus in farms using oestrus detection by observation, and may enable the timing of AI to be optimised. Similarly, PGF 2α administration leads to improved oestrus detection rates, since the number of mountings increases with the number of animals displaying oestrus, due to behavioural and pheromonal interactions.…”

Section: Discussionmentioning

confidence: 90%

“…Both studied PGs produced abundant, clear cervical mucus, perhaps due to an improved PGF 2α -mediated follicular growth (Armstrong, 1981) and by the enhancement of oestradiol and LH secretion (Tsiligianni et al, 2001). Whether PGs have direct effects on follicular growth prior to the LH surge to initiate ovulation in livestock is unknown, but PGF 2α increases pituitary responsiveness to GnRH to release LH in the postpartum cow (Weems et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

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Oestrus synchronisation in postpartum dairy cows using repetitive prostaglandin doses: Comparison between D-cloprostenol and dinoprost

Marı́n

Sánchez

Vizuete

et al. 2015

Acta Veterinaria Hungarica

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This trial evaluated the reproductive performance in an early routine oestrus induction programme using two different PGF 2α preparations in dairy cattle. D-cloprostenol sodium (n = 192; Group A) or dinoprost (n = 187; Group B) was administered between days 35 and 42 post partum. Also, a group of non-treated cows (n = 135; Group C) was included as control. Pedometers were used to detect oestrus, and also secondary oestrous signs and vaginal mucus quality were assessed prior to artificial insemination (AI). When oestrus was not detected for 14 days after PGF 2α administration, the treatment was repeated, up to a maximum of three times. There were no differences between the study groups in oestrus detection (A = 73.48%, B = 73.01%, C = 79.26%; P = 0.428), good mucus quality (A = 96.45%, B = 91.30%, C = 93.45%; P = 0.203) and the presence of mounting lesions (A = 98.58, B = 94.93%, C = 98.13; P = 0.414). First-service pregnancy rates were 19.78%, 15.64% and 32.03% in Groups A, B and C, respectively (P = 0.003). There were no inter-group differences for the interval from parturition to first AI. However, a significantly shorter interval from parturition to conception (92.17 days, 99.45 days, 118.93 days; P = 0.002) and significantly less services per conception (2.12, 2.18, 2.66; P = 0.003) were observed in Groups A and B in comparison with Group C. The use of PGF 2α resulted in better fertility in a repetitive, routine postpartum programme, although no differences between Dcloprostenol and dinoprost were detected.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Oestrus synchronisation in postpartum dairy cows using repetitive prostaglandin doses: Comparison between D-cloprostenol and dinoprost

Marı́n

Sánchez

Vizuete

et al. 2015

Acta Veterinaria Hungarica

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“…Both physical and biochemical characteristics of cervical mucus are changed under hormonal‐induced estrus (Tsiligianni et al . ,b). Total protein level of the cervical mucus stimulated by PGF 2 α was higher compared to natural estrus (Yildiz & Aydin ).…”

Section: Discussionmentioning

confidence: 99%

“…However, no difference in pH values was detected between normal and induced estrus, as well as between cows that conceived after AI or not (Tsiligianni et al . , 2001a). The Ca 2+ level of mucus is associated with viscosity and crystallization phenomena (Tsiligianni et al .…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of three hormonal protocols for anovulatory lactating cows under regulations restricting the use of estrogenic compounds

Wang

et al. 2018

Animal Science Journal

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When European Union regulations restricted the use of estrogenic compounds in food-producing animals, refined hormonal protocols were no longer applicable for anovulatory cows. However, Ovsynch and its adaptations are routinely and uniformly applied to all cows regardless of ovarian function. To evaluate their efficacy on anovulatory cows, 143, 147 and 144 anovulatory cows received Ovsynch, Presynch and G6G protocols, respectively. In comparison, 150 cyclic cows were bred without using a synchronized protocol. Results showed that cows in the Presynch group had luteolysis responding to the last prostaglandin F (PGF ) injection greater than the Ovsynch group. The serous progesterone levels at the first gonadotropin-releasing hormone of Ovsych and the last PGF injection was greater in the G6G group than the other two hormonal treatment groups. Concentrations of Ca and total protein in cervical mucus in all three hormone-treated groups before artificial insemination (AI) were significantly different from the controls. The G6G group obtained a greater pregnancy rate compared with Ovsynch and Presynch, but significantly less than the controls. For open cows in the Ovsynch group, estrus rate within 24 days after the first AI was significantly less than the controls. In conclusion, the G6G treatment resulted to better reproductive performance in anovulatory cows.

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Crystallization and the number of neutrophils increase in the cervical mucus as parturition approaches in dairy cows

2005

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Physical properties of bovine cervical mucus during normal and induced (progesterone and/or PGF2α) estrus

Cited by 31 publications

References 25 publications

Oestrus synchronisation in postpartum dairy cows using repetitive prostaglandin doses: Comparison between D-cloprostenol and dinoprost

Oestrus synchronisation in postpartum dairy cows using repetitive prostaglandin doses: Comparison between D-cloprostenol and dinoprost

Evaluation of three hormonal protocols for anovulatory lactating cows under regulations restricting the use of estrogenic compounds

Crystallization and the number of neutrophils increase in the cervical mucus as parturition approaches in dairy cows

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