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Abstract

Objective: To determine if insemination site or pre-ovulatory follicle diameter at fixed-time artificial insemination (FTAI) affects the odds of pregnancy when heifers are inseminated with sexed semen. Methods: The study was conducted in 422 Holstein heifers enrolled into 531 inseminations. ...

Author(s)
Ingenhoff, L.; Hall, E.; Ni, S. R.; House, J. K.
Publisher
Wiley, Melbourne, Australia
Citation
Australian Veterinary Journal, 2017, 95, 9, pp 317-324
Abstract

The embryo production results after use of sex-sorted sperm to inseminate superovulated cows (SOV) have not been very encouraging so far, due to the low quantity of sperms used as well as their short half-life. In a previous study conducted in Brazil in Holstein cows, it was shown that using the...

Author(s)
Argudo, D. E.; Soria, C. A.; Durán, J. C.; Bravo, S. E.; Alvarado, J. P.; Alberio, R. H.
Publisher
Veterinaria Organizacion S.L., Malaga, Spain
Citation
REDVET, 2018, 19, 4, pp 041811
Abstract

Our objective was to compare the insemination dynamics and time to pregnancy for up to 100 d after the beginning of the artificial insemination period (AIP) for heifers managed with first artificial insemination (AI) service programs that relied primarily on insemination at detected estrus (AIE)...

Author(s)
Masello, M.; Perez, M. M.; Granados, G. E.; Stangaferro, M. L.; Ceglowski, B.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 2, pp 1671-1681
Abstract

The results of a comparative analysis of the productivity of Holsteinized Black-and-White cows are presented, depending on the age of the first insemination. Primers of the Wis Beck Ideal line had the highest productivity, and it was 10073 kg. They outperformed their contemporaries of the line...

Author(s)
Basonov, O. A.
Publisher
Redaktsiya zhurnala Zootekhniya, Moscow, Russia
Citation
Zootekhniya, 2018, No.11, pp 30-32
Abstract

The aim of this study was to determine how polyunsaturated fatty acids (PUFA) supplementation can affect the productive and reproductive performance in dairy cows subjected to a fixed-time artificial insemination (TAI) protocol under farm conditions. One hundred and ninety-eight Holstein...

Author(s)
Castro, T.; Martinez, D.; Isabel, B.; Cabezas, A.; Jimeno, V.
Publisher
MDPI AG, Basel, Switzerland
Citation
Animals, 2019, 9, 5, pp 205
Abstract

The objectives of the present study were: (1) to investigate variation in the genetic component of heat stress for nonreturn rate at 56 days after first artificial insemination (NR56); (2) to identify and characterize the genotype by environment interaction (G × E) due to heat stress for NR56 of...

Author(s)
Santana Júnior, M. L.; Bignardi, A. B.; Stefani, G.; El-Faro, L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 98, pp 101-107
Abstract

The objective was to determine the efficiency of insemination with sexed semen at spontaneous estrus and synchronisation of ovulation, and the effects of days in milk, insemination number, parity, and daily milk yield on pregnancy rates in lactating Holstein cows. A total 1,000 first to fourth...

Author(s)
Kurykin, J.; Jalakas, M.; Kaart, T.; Jaakma, Ü.
Publisher
Lietuvos Veterinarijos Akademija, Kaunas, Lithuania
Citation
Veterinarija ir Zootechnika, 2017, No.75, pp 30-35
Abstract

Author(s)
Walsh, J. P.; Coates, A.; Lima, F.; Smith, R.; Oikonomou, G.
Publisher
British Cattle Veterinary Association, Quedgeley, UK
Citation
Cattle Practice, 2017, 25, 3, pp 160-161
Abstract

Fertility-promoting effects of treatment of lactating dairy cattle with human chorionic gonadotropin (hCG) after artificial insemination (AI) have been variable. Here, we tested whether fertility response to hCG in lactating Holstein cows interacts with genotype and parity. Primiparous (n=538) and...

Author(s)
Zolini, A. M.; Ortiz, W. G.; Estrada-Cortes, E.; Ortega, M. S.; Dikmen, S.; Sosa, F.; Giordano, J. O.; Hansen, P. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 1, pp 846-856
AbstractFull Text

The objective of this study was to develop models for determination the superiority of Holstein bulls as a producer of frozen semen and inheritance of the genetic traits of milk production. The ability of the bull to produce frozen semen per years was analyzed descriptively. Reproductive efficiency ...

Author(s)
Argiris, A.; Santoso, S. I.; Ondho, Y. S.; Kurnianto, E.
Publisher
Faculty of Animal Agriculture, Diponegoro University and Indonesian Society of Animal Agriculture, Semarang, Indonesia
Citation
Journal of the Indonesian Tropical Animal Agriculture, 2019, 44, 1, pp 47-55

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