A Review of Attempts to Improve Cow Fertility Through Reproductive Management: Estrous Synchronisation

Elmetwally, Mohammed A; Hussien, Adel; Sharawy, Heba; Mostagir, Amira; Risha, Engy; Eldomany, Wael; Hegab, A O; Zaabel, Samy; Darwish, Madeha

doi:10.14302/issn.2575-1212.jvhc-21-3973

Cited by 2 publications

(3 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Estrus synchronization aims to obtain estrus simultaneously, more effortless observation of estrus, and finally, the insemination can be carried out simultaneously. PGF2α administration caused regression of the functional corpus luteum and was followed by estrus (Elmetwally et al, 2021). Estrus rate after double injection of PGF2α in this study (66.67%) was lower than those reported by Venkata Ramana et al (2013) (82%) and Hafizuddin et al (2012) (100%).…”

Section: Discussioncontrasting

confidence: 67%

Determination of estrus duration based on cervical mucus characteristics in Aceh cattle using camera-equipped artificial insemination endoscope

Drh.

Mulfristia

Saputra³

et al. 2022

Ovz

View full text Add to dashboard Cite

This study aimed to determine the length of the estrus period in Aceh cows based on changes in the characteristics of cervical mucus observed using a camera-equipped artificial insemination (AI) endoscope. This study used twelve healthy and reproductively sound cows aged 4-6 years. All cows were synchronized using prostaglandin F2α (PGF2α) injected intramuscularly twice, 11 days apart. Estrus detection was conducted 24 hours following the second injection of PGF2α three times daily for 30 minutes, respectively. Estrous cows were then subjected to the examination of their cervical mucus at 0, 6, 12, and 18 hours after the beginning of estrus. This study showed that out of 12 samples, only eight cows exhibited estrus signs. Characteristics of cervical mucus of cows at 0 and 6 hours of estrus were transparent. At 12 hours of estrus, five cows showed transparency, and the remaining three cows showed cloudy cervical mucus. Meanwhile, at 18 hours of estrus, all sampled cows showed cloudy cervical mucus then regarded as the end of the estrus. That means the estrus length of Aceh cows in this study was 15.75 ± 3.11 hours. It can be concluded that the determination of the duration of estrus in Aceh cows based on changes in the characteristics of the cervical mucus can be carried out using an AI endoscope with a camera. For further research, it is suggested to apply this estrus detection technique in the implementation of AI and determine the pregnancy rate.

show abstract

Section: Discussioncontrasting

confidence: 67%

Determination of estrus duration based on cervical mucus characteristics in Aceh cattle using camera-equipped artificial insemination endoscope

Drh.

Mulfristia

Saputra³

et al. 2022

Ovz

View full text Add to dashboard Cite

show abstract

“…The improvement of the fertility of dairy cows is considered a high priority to maximize the profitability of the dairy farms (Cabrera, 2014). Many dairy cows do not conceive on the first treatment, due to inactivity of the corpus luteum at the time of prostaglandin shots making it necessary for dairies to establish a system for the prediction of the pregnancy and re‐inseminating the nonpregnant cows (Elmetwally et al, 2021; Giordano et al, 2012). Ultrasonography images may provide information regarding the physiological stage of the corpus luteum and follicular dynamic during the oestrous cycle in cows (Gnemmi et al, 2020; Satheshkumar, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…

The improvement of the fertility of dairy cows is considered a high priority to maximize the profitability of the dairy farms (Cabrera, 2014).Many dairy cows do not conceive on the first treatment, due to inactivity of the corpus luteum at the time of prostaglandin shots making it necessary for dairies to establish a system for the prediction of the pregnancy and re-inseminating the nonpregnant cows (Elmetwally et al, 2021;Giordano et al, 2012). Ultrasonography images may provide information regarding the physiological stage

…”

mentioning

confidence: 99%

Impact of the corpus luteum and follicular parameters on the levels of plasma progesterone and the prediction of pregnancy in Holstein dairy cows

Sharawy,

Hegab,

Elmetwally

2023

Reprod Domestic Animals

View full text Add to dashboard Cite

The objective of this study was to investigate the reliability of corpus luteum and dominant follicles, imaging parameters on the plasma progesterone, and prediction of pregnancy in cows. In total, 48 cows were used in this study and underwent Ovsynch program. Ultrasound imaging of the ovaries was done at the time of PG shots. Corpus luteum diameter (CL_d), area (CL_area), volume (CL_vol), and pixels (CL_PXL), as well as dominant follicle diameter (F_d) and area (F_area), were estimated using the ImageJ program. Blood samples were taken to assess progesterone (P4) concentrations. Pregnancy status was determined at 32 ± 3 days after insemination using an ultrasound “Sonoscape‐5 V.” Data were analysed using correlation analysis and ROC curves. Plasma P4 concentration showed positive correlation with CL_d (r = .68, p < .01), CL_area (r = .45, p < .01), CL_volume (r = .41, p < .01), and CL_pixels (r = .67, p < .01). The ROC curve indicated that P4 concentrations and CL parameters, especially the CL_pixels, were the best predictors of the pregnancy, among the others that were able to detect pregnancy at the time of PG with the best P4 and CL_pixels cut‐off value (4.1 ng/mL and 43.18) and AUC was (0.95 and 0.89); resp. (p < .001). Regarding the other parameters, it was possible to set AUC 0.79, 0.79, and 0.68 for CL_d, area, and volume with a sensitivity of 66.7%, 70.8%, and 66.7% and a specificity of 88.2%, 82.4%, and 70.4% (p < .01), respectively. The AUC for both the follicular diameter and F_area was (0.56) with a sensitivity of 58.33% and 70.8% and a specificity of 62.5% and 50% (p > .05), respectively. In conclusion, CL measurements and progesterone concentrations had the greatest pregnancy prediction in Holstein dairy cows.

show abstract

A Review of Attempts to Improve Cow Fertility Through Reproductive Management: Estrous Synchronisation

Cited by 2 publications

References 95 publications

Determination of estrus duration based on cervical mucus characteristics in Aceh cattle using camera-equipped artificial insemination endoscope

Determination of estrus duration based on cervical mucus characteristics in Aceh cattle using camera-equipped artificial insemination endoscope

Impact of the corpus luteum and follicular parameters on the levels of plasma progesterone and the prediction of pregnancy in Holstein dairy cows

Contact Info

Product

Resources

About