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Abstract

The objective of this study was to determine if there are differences in luteal size (LS), progesterone (P4), and luteal blood flow (LBF) between pregnant and non-pregnant Bos indicus dairy cows during the first three weeks after insemination, and whether these parameters are related to each other. ...

Author(s)
Hassan, M.; Arshad, U.; Bilal, M.; Sattar, A.; Avais, M.; Bollwein, H.; Ahmad, N.
Publisher
Society for Reproduction and Development, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2019, 65, 1, pp 29-36
Abstract

The aim of this study was to test the suitability of the interspecific hemizona assay (HZA) to predict the fertilizing capacity of bovine sperm after modifying the length of the equilibration period before freezing and thawing. Ejaculates from 10 proven fertile bulls were split after dilution,...

Author(s)
Gürler, H.; Podhajsky, E.; Özen, D.; Leiding, C.; Bollwein, H.; Meinecke-Tillmann, S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 106, pp 157-163
Abstract

The objective of this study was to investigate whether confirmation of suitability for service by traditional methods, observation and transrectal palpation, is improved in cattle by additional ultrasonographic examination of the uterus and ovaries. The data from 600 lactating cows from Southern...

Author(s)
Lüttgenau, J.; Mang, H.; Borel, N.; Bruckmaier, R. M.; Bollwein, H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 4, pp 664-670
Abstract

Sonomicrometry allows the measurement of the distance between 2 piezoelectric crystals and has been widely used to investigate the contractility of the heart and gastrointestinal tract. The objective of this study was to determine whether this method can be used to quantify the reduction in uterine ...

Author(s)
Heppelmann, M.; Krach, K.; Krüger, L.; Benz, P.; Herzog, K.; Piechotta, M.; Hoedemaker, M.; Bollwein, H.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 3, pp 1862-1869
Abstract

The aim of this study was to investigate the effect of puerperal uterine disease on histopathologic findings and gene expression of proinflammatory cytokines in the endometrium of postpuerperal dairy cows; 49 lactating Holstein-Friesian cows were divided into two groups, one without (UD-; n=29) and ...

Author(s)
Heppelmann, M.; Weinert, M.; Ulbrich, S. E.; Brömmling, A.; Piechotta, M.; Merbach, S.; Schoon, H. A.; Hoedemaker, M.; Bollwein, H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 7, pp 1348-1356
Abstract

The objective of this study was to examine whether an oxytocin challenge test (OCT), evaluated by measuring the changes in uterine blood flow using transrectal colour Doppler ultrasonography, is a suitable non-invasive method to determine uterine contractility in puerperal dairy cows. The changes...

Author(s)
Magata, F.; Hartmann, D.; Ishii, M.; Miura, R.; Takahashi, H.; Matsui, M.; Kida, K.; Miyamoto, A.; Bollwein, H.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Journal, 2013, 196, 1, pp 76-80
Abstract

The objective of this study was to investigate the effect of time of first postpartum ovulation on endometrial inflammation in dairy cows with and without uterine disease during the early puerperal period. Transvaginal follicular puncture (FP) was carried out to suppress postpartum ovulation and...

Author(s)
Heppelmann, M.; Brömmling, A.; Ulbrich, S. E.; Weinert, M.; Piechotta, M.; Wrenzycki, C.; Merbach, S.; Schoon, H. A.; Hoedemaker, M.; Bollwein, H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 84, 1, pp 155-162
Abstract

Persistence of the corpus luteum (CL) in cattle usually occurs during the puerperium and is associated with interference of prostaglandin (PG) F release from the uterus. The objective of the present study was to determine for the first time the gene expressions in the persistent CL compared with...

Author(s)
Magata, F.; Shirasuna, K.; Strüve, K.; Herzog, K.; Shimizu, T.; Bollwein, H.; Miyamoto, A.
Publisher
Society for Reproduction and Development, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2012, 58, 4, pp 445-452
Abstract

The somatotropic axis is a key metabolic pathway during transition from late pregnancy to early lactation in dairy cows. The first objective of this study was to determine the feasibility of selecting cows with persistent differences in total insulin-like growth factor 1 (IGF-1) concentration by...

Author(s)
Piechotta, M.; Kedves, K.; Araujo, M. G.; Hoeflich, A.; Metzger, F.; Heppelmann, M.; Muscher-Banse, A.; Wrenzycki, C.; Pfarrer, C.; Schuberth, H. J.; Hoedemaker, M.; Bollwein, H.; Kaske, M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 6, pp 3737-3749
Abstract

Data from various studies indicate that the ovarian function in dairy cows can be compromised during intramammary infections. Therefore, in this study, we investigated if an experimentally induced mastitis has an effect on corpus luteum (CL) function in 14 lactating cows. On d 9 of the estrous...

Author(s)
Lüttgenau, J.; Wellnitz, O.; Kradolfer, D.; Kalaitzakis, E.; Ulbrich, S. E.; Bruckmaier, R. M.; Bollwein, H.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 5, pp 4018-4031

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