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Animal Science Database

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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

This study aimed to contribute to understanding the interface between reproductive and nutritional energetic physiology in contemporary dairy cattle. Multiparous Holstein cows (n=32) between 70 and 180 days in milk were used in a study starting 10 d prior to the artificial insemination (AI) date...

Author(s)
Gomez, N. A.; Conley, A. J.; Robinson, P. H.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 189, pp 136-145
Abstract

Greater metabolic demands in high-producing dairy cows are believed to be a cause of sub-fertility in these animals. Previously, supplementation with vitamin B complex molecules has shown benefits in improving milk production, health, and reproductive efficiency of dairy cows. The primary aim of...

Author(s)
Kaur, M.; Hartling, I.; Burnett, T. A.; Polsky, L. B.; Donnan, C. R.; Leclerc, H.; Veira, D.; Cerri, R. L. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 2, pp 1642-1657
Abstract

The objective was to compare luteal area (LA), luteal blood flow (LBF), and progesterone (P4) concentration before and after artificial insemination (AI) in pregnant and open cows in the diestrus preceding insemination and during the first 21 d after insemination. A number of 119 multiparous German ...

Author(s)
Berger, H.; Lietzau, M.; Tichy, A.; Herzog, K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 104, pp 115-119
Abstract

Two experiments were performed to test the hypothesis that administering PGF concurrent with timed artificial insemination (AI) in lactating dairy cows would enhance pregnancy per AI (P/AI). In experiment 1, lactating Holstein cows (n=289) in one herd were enrolled after a non-pregnancy diagnosis ...

Author(s)
Sauls, J. A.; Voelz, B. E.; Mendonça, L. G. D.; Stevenson, J. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 110, pp 27-33
Abstract

Mammalian sperm are exposed to a natural hypoosmotic environment during male-to-female reproductive tract transition; although this activates sperm motility in vivo, excessive swelling can harm sperm structure and function. Aquaporins (AQPs) is a family of membrane-channel proteins implicated in...

Author(s)
Kasimanickam, R. K.; Kasimanickam, V. R.; Arangasamy, A.; Kastelic, J. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 89, pp 162-168
Abstract

Recent studies have shown significant associations between prepartum energy status and postpartum fertility in dairy cows; therefore, the assessment of energy status by blood metabolites and metabolic hormones and suitable improvement of management during the prepartum period may enhance...

Author(s)
Kawashima, C.; Karaki, C.; Munakata, M.; Matsui, M.; Shimizu, T.; Miyamoto, A.; Kida, K.
Publisher
Wiley-Blackwell, Melbourne, Australia
Citation
Animal Science Journal, 2016, 87, 10, pp 1218-1224
Abstract

The primary objective was to determine if low doses of PGF2α (dinoprost) given intramuscularly (im) concurrent with timed artificial insemination (TAI) would improve conception rates in dairy cattle. A secondary objective was to determine if body condition score (BCS) and parity would influence...

Author(s)
Ambrose, D. J.; Mohanathas Gobikrushanth; Zuidhof, S.; Kastelic, J. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 83, 4, pp 529-534
Abstract

Sex preselection by flow sorting of X- and Y-sperm has been proven to be an efficient and economically feasible strategy for use in Holstein dairy cow breeding, and previous reports have demonstrated the feasibility of altering the sex ratio in buffalo species by using sexed semen in either ...

Author(s)
Lu YangQing; Liao YanQiong; Zhang Ming; Yang BingZhuang; Liang XianWei; Yang XiaoGan; Lu ShengSheng; Wu ZhuYue; Xu HuiYan; Liang YunBin; Lu KeHuan
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 84, 6, pp 862-867
Abstract

Fusion failure of the Müllerian ducts is thought to occur congenitally in cattle. We aimed to elucidate the contribution of incomplete fusion of the Müllerian ducts to reproductive difficulties in dairy cattle. We observed the vaginas of Holstein cattle to classify the anomalies into mild and...

Author(s)
Ishiyama, D.; Nakamura, Y.; Tanaka, T.; Magata, F.; Matsuda, F.; Maeda, K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 123, pp 209-215

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