Comparison of fertility of liquid or frozen semen when varying the interval from CIDR removal to insemination

Richardson, Brittany N.; Larimore, E. L.; Walker, Julie; Utt, M. D.; DeJarnette, J.M.; Perry, George A.

doi:10.1016/j.anireprosci.2017.01.010

Cited by 8 publications

(14 citation statements)

References 36 publications

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“…Besides the discussed harming effects, cryopreservation may lead to capacitation-like changes in spermatozoa which compromises sperm longevity (Aitken et al, 2015;Papa et al, 2015). This is in accordance with Richardson et al (2017), who described a longer lifespan of fresh ID over frozen ones and therefore increased range in timing of an AI without affecting fertility. To ensure the best possible result after artificial insemination, dairy producers must manage precise heat detection, timing of insemination in relation to oestrus and proper handling of the insemination doses (Beran et al, 2013;Vincent et al, 2014).…”

Section: Introductionsupporting

confidence: 56%

Comparative Study of Pregnancy Rate of Dairy Cows Inseminated with Fresh or Frozen-Thawed Semen

Pytlík¹,

Stádník²,

Ducháček³

et al. 2020

Acta Univ. Agric. Silvic. Mendelianae Brun.

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The aim of this study was to investigate conception rates (CR) achieved with artificial insemination of Holstein cows using fresh or frozen insemination doses (ID). The synchronization protocols (Double-Ovsynch, Ovsynch, ReSynch) and pedometers were used to secure proper timing of artificial inseminations (AI). Total of 3979 inseminations data were recorded. Statistical analysis was performed using the SAS 9.3 package. For the evaluation of a CR, the effects of ID type, season, year, sire breed, lactation number and oestrus detection type, were analysed. Cows inseminated with fresh ID performed higher CR (+4.86%; P < 0.05). Best pregnancy per artificial insemination (P/AI) success was observed during the winter season (+11.82%; P < 0.01). Parity affected P/AI with primiparous having a greater P/AI than multiparous cows (P < 0.01). The least likelihood of pregnancy success matched up with ReSynch and the highest with Ovsynch protocol (+7.7%; P < 0.05). In conclusion, fresh ID manifested superior CR over frozen-thawed semen under common conditions of Czech dairy farming. Similar or better P/AI was achieved when an automated activity monitoring were used rather than timed AI based on Ovsynch protocol, indicating a possible reduction in hormonal treatment applications without affecting fertility of high producing dairy cows.

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Section: Introductionsupporting

confidence: 56%

Comparative Study of Pregnancy Rate of Dairy Cows Inseminated with Fresh or Frozen-Thawed Semen

Pytlík¹,

Stádník²,

Ducháček³

et al. 2020

Acta Univ. Agric. Silvic. Mendelianae Brun.

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show abstract

“…Cows inseminated 10 hours after the AAM alarm, i.e, closer to ovulation, showed better pregnancy rates, regardless of parity and estrus synchronization protocol, possibly due to the higher number of viable spermatozoa reaching the isthmus and having access to the zona pellucida at the time of AI when performed closer to the time of ovulation (RICHARDSON et al, 2017). LÓPEZ-GATIUS (2022) and COLAZO et al (2023) suggested that breeding efficiency in dairy herds can be improved by optimizing AI timing closer to the end of estrus behavior once the ovulation typically occurs 10-12 hours after this marker (SUMIYOSHI et al, 2017).…”

Section: Variablesmentioning

confidence: 99%

Artificial insemination timing on pregnancy rate of Holstein cows using an automated activity monitoring

Marques,

Almeida,

Oliveira

et al. 2024

Cienc. Rural

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This study evaluated the probability of pregnancy and associated factors for two times artificial inseminations (AI), 8 or 10 hours after automated activity monitoring (AAM) alarm on the first postpartum AI of 1,054 Holstein dairy cows. The estrus was synchronized by prostaglandin or estradiol-progesterone program. Stepwise logistic regression was performed to analyze the probability of pregnancy, and associated factors (activity, estrus intensity, parity, peripartum health, retained placenta, postpartum vaginal discharge, and season). The highest pregnancy rates were obtained with multiparous animals, inseminated ten hours after the AAM alarm, in the fall or winter season, with a high activity peak and estrus intensity (P < 0.05). Peripartum diseases, retained placenta, and postpartum vaginal discharge negatively influenced the pregnancy rate, regardless of parity. Thus, the optimization of AAM models by including on-farm measures like parity, peripartum health history, and environmental conditions may favor the correct identification of estrus and improve the AAM alarm regarding the ideal moment for AI, increasing the reproductive performance in dairy cows.

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“…In this context, the detection of estrus and appropriate timing of AI prior to ovulation in the ovary are important for obtaining successful pregnancies and offspring production (Sales et al, 2011;Richardson et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…However, the conception rate of cows may differ depending in the number of sperm introduced into the uterus (Mohanty et al, 2018), as well as on the type of semen (liquid vs. freeze-thawed semen) used (Richardson et al, 2017). In Korea, the Hanwoo Bull Center (Hanwoo Improvement Center, NH, Seosan, Korea) selected elite Hanwoo bulls across the nation and produced ~10 million frozen straws per Hanwoo bull lifespan.…”

Section: Introductionmentioning

confidence: 99%

Pregnancy rate in Hanwoo cows after timed artificial insemination using different sperm concentrations

Kang,

Cho,

Kim

et al. 2024

J Anim Reprod Biotechnol

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Background: Sperm quality and the number of sperm introduced into the uterus during artificial insemination (AI) are pivotal factors influencing pregnancy outcomes. However, there have been no reports on the relationship between sperm concentration at AI and sperm quality in Hanwoo cattle. In this study, we examined sperm quality and pregnancy rates after AI using sperm inseminated at different concentrations. Methods: We evaluated the motility, viability, and acrosomal membrane integrity of sperm at different concentrations (10, 15, 18, and 20 million sperm/straw) in 0.5-mL straws. Subsequently, we compared the pregnancy rates after AI with different sperm concentrations. Results: After freeze-thawing, sperm at the assessed concentrations showed similar viability and acrosomal membrane integrity. After AI, cattle in the 10 million group had significantly lower pregnancy rates compared to those in the 18 and 20 million groups. Conversely, there were no statistically significant variances observed between cattle in the 10 and 15 million groups. Conclusions: Sperm at concentrations of 10, 15, 18 and 20 million per straw exhibited comparable motility, viability, and acrosomal membrane integrity. However, a concentration of at least 18 million sperm per straw is required to achieve a consistent rate of pregnancy rate in Hanwoo cattle after AI.

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Comparison of fertility of liquid or frozen semen when varying the interval from CIDR removal to insemination

Cited by 8 publications

References 36 publications

Comparative Study of Pregnancy Rate of Dairy Cows Inseminated with Fresh or Frozen-Thawed Semen

Comparative Study of Pregnancy Rate of Dairy Cows Inseminated with Fresh or Frozen-Thawed Semen

Artificial insemination timing on pregnancy rate of Holstein cows using an automated activity monitoring

Pregnancy rate in Hanwoo cows after timed artificial insemination using different sperm concentrations

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