Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Martina Hoedemaker"'
Autor:
M. Heppelmann, Heiner Bollwein, Marion Schmicke, Martina Hoedemaker, S. Merbach, Olga Wellnitz, W Bäumer, C. Pfarrer, J. Volland, M Kietzmann, H-A Schoon
Publikováno v:
Animal Reproduction Science. 188:144-154
The aim of this study was to investigate the effects of PGF2α and oxytocin in vitro on myometrial contractility in puerperal uteri. Thirteen puerperal uteri were removed and perfused after euthanasia of cows with (n=7) and without metritis (n=6). Me
Autor:
H.-A. Schoon, H. Marien, M. Feldmann, Martina Hoedemaker, G. Henningsen, W. Hasseler, K. Herzog
Publikováno v:
Theriogenology. 102:44-47
The objective was to validate the iVET ® birth monitoring system and to determine if it reduced fetal death in primiparous dairy heifers over a 1-y interval. There were 359 pregnant heifers enrolled; 167 heifers in the iVET ® group were monitored e
Publikováno v:
Animal Reproduction Science. 184:211-217
The aim of this study was to compare the automatic estrous detection system (AED) Heatime ® with visual estrous detection (VED). The study was conducted on 139 Holstein Friesian cows in one dairy herd in Northern Germany. The cows were fitted with a
Publikováno v:
Livestock Science. 189:78-81
The assessment of the rectal temperature plays an important role in the early detection of bovine respiratory disease (BRD) in young calves, but the measurement is invasive and labor-intensive. The aims of this retrospective field-trial evaluation we
Autor:
Martina Hoedemaker, T. Heilkenbrinker, S. Merbach, H.P. Klindworth, D. Hartmann, J. Rohkohl, Heinz-Adolf Schoon
Publikováno v:
Theriogenology. 85:247-253
The objective of this study was to determine whether cervicitis in dairy cows is an independent disease or occurs concomitantly with inflammation of the uterus, and to clarify possible effects of cervicitis on reproductive performance. Dairy cows (n
Autor:
L. Steinhoff, Marion Schmicke, Marie M. Meyerholz, Martina Hoedemaker, Klaus Jung, J. Heidekorn-Dettmer
Publikováno v:
Theriogenology. 129
The thyroid hormone axis is one important endocrine system within a complex system of various factors and hormones necessary to establish and maintain pregnancy in cattle and in metabolic adaptations towards lactation. Pregnancy and lactation occur c
Autor:
Hendrike Knaack, Marion Piechotta, M. Lietzau, M. Gil Araujo, Martina Hoedemaker, Christine Wrenzycki, K. Mense, Marie Margarete Meyerholz
Publikováno v:
Journal of Dairy Science. 98:2409-2418
Pituitary growth hormone (GH) release and hepatic insulin-like growth factor-I (IGF-I) production increase after an injection of 17β-estradiol (E2) in ovariectomized dairy cattle. However, whether endogenous sexual steroid hormones also influence th
Autor:
Heinrich Bollwein, M. Heppelmann, K. Krach, Marion Piechotta, P. Benz, K. Herzog, Martina Hoedemaker, Lars Krüger
Publikováno v:
Journal of Dairy Science. 98:1862-1869
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
Autor:
Marion Piechotta, Philipp Benz, Karoline Krach, Martina Hoedemaker, Heinrich Bollwein, Kathrin Herzog, Lars Krueger, M. Heppelmann
Publikováno v:
The Journal of Reproduction and Development
The objective of this study was to examine the effects of metritis and subclinical hypocalcemia on reduction of uterine size in dairy cows using ultrasonography and sonomicrometry. Four piezoelectric crystals were implanted via laparotomy into the my
Publikováno v:
Reproduction in domestic animals = Zuchthygiene. 53(1)
Contents Parturition is one of the most important events in reproduction. Regardless of many studies, exact time for pregnancy termination and onset of parturition is impossible to determine. The aim of this study was to describe and to compare prote