C. Hanzen

Publications140
h-index16
Citations1,084
Highly Influential Citations62
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When is a cow in estrus? Clinical and practical aspects.
Good detection of estrus is critically important in dairy husbandry. Incorrect detection of estrus is related to loss of profit due to extended calving intervals, milk loss, veterinary costs, etc.… Expand
Relationship between haptoglobin, serum amyloid A, and clinical status in a survey of dairy herds during a 6-month period.
BACKGROUND Haptoglobin and serum amyloid A are major acute phase proteins in cattle. Dairy cattle often develop pathologic conditions in the peripartum period; acute phase proteins may be useful in… Expand
Relative accuracy of the identification of ovarian structures in the cow by ultrasonography and palpation per rectum.
Manual palpation or ultrasonographic examination of the cow's genital tract are currently used by veterinarians involved in reproductive management, but knowledge of the potential and the limitations… Expand
Factors affecting the response to the specific treatment of several forms of clinical anestrus in high producing dairy cows.
This study was designed to examine estrous response rates to the therapeutic treatment of clinical anestrus in high producing dairy cows and to identify the factors that could affect these rates.… Expand
Influence of calving season on the interactions among reproductive disorders of dairy cows.
The objective of this study was to evaluate the influence of calving season on the interactions among reproductive disorders prior to conception and their effect on subsequent reproductive… Expand
Evaluation of false ultrasonographic diagnoses in cows by measuring plasma levels of bovine pregnancy-associated glycoprotein 1
Between days 27 and 59 after artificial insemination (AI), 189 ultrasonographic pregnancy diagnoses were made in 56 dairy cows using a 7.5 MHz linear-array rectal transducer. Blood samples were… Expand
The behaviour of cow blastocyst in vitro: cinematographic and morphometric analysis.
The behaviour of the cow blastocyst in vitro was studied by time-lapse cinematography and analysed by morphometry. Three types of behaviour were observed: continuous expansion followed by hatching;… Expand
Use of transrectal B-mode ultrasound imaging in bovine pregnancy diagnosis
A 3 MHz ultrasonic transducer was used to make pregnancy diagnoses in 320 milk and beef cows and heifers, on average 41 days after the last insemination. The ultrasound diagnostic findings were… Expand
Effects of ovum pick-up frequency and FSH stimulation: a retrospective study on seven years of beef cattle in vitro embryo production.
The aim of this retrospective study was to compare the number of follicles, cumulus oocyte complexes (COCs) and cultured In Vitro Produced (IVP) embryos obtained from 1396 non-stimulated Ovum Pick-up… Expand
Comparison of reproductive performance in Belgian dairy and beef cattle.
A computerized program was written to collect, evaluate and compare reproductive performance data of 2004 beef (Belgian Blue breed) and 1649 dairy (Friesian Holstein and German Red) cattle in 35… Expand
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