Publications by authors named "Heiner Bollwein"
Metritis is an important disorder in dairy cows during the early postpartum period. Myometrial contractility is a prerequisite for uterine involution; however, very scanty literature is available about the effect of metritis on this process and endocrine responsiveness. This study was aimed to evaluate the effect of inflammation on uterine contractility in vitro, and the inflammation was induced by incubating myometrial strips with lipopolysaccharides (LPS).
View Article and Find Full Text PDF[Gender determination in equine fetuses in early pregnancy using two- and three-dimensional ultrasound].
Tierarztl Prax Ausg G Grosstiere Nutztiere
June 2020
Aim: The aim of this study was to compare transrectal two-dimensional (2D) and three-dimensional (3D) ultrasound examination with regards to required time and accuracy of fetal sex determination in early pregnant mares.
Materials And Methods: For this purpose 47 mares were examined transrectally once between days 58 and 115 of gestation. Initially, the fetal sex was determined by identifying the location of the genital tubercle (GT) or external genitalia using 2D-ultrasound.
The aim of the present study was to evaluate the effect of different freezing procedures on sperm motion, viability, the acrosome status, mitochondrial membrane potential (MMP), intracellular calcium content, and DNA integrity on epididymal stallion sperm. Therefore, the sperm of 10 healthy stallions was harvested by retrograde flushing after testectomy, diluted with a semen extender containing defined milk proteins and a freezing extender containing egg yolk and glycerol and frozen according to 4 different protocols, using a programmable freezer and a floating rack performing a slow (processes 1 and 2) or a fast cooling rate (processes 3 and 4, respectively). Post-thaw total motility and slow sperm values were lower when using process 4 compared with processes 1 and 2 (P < .
View Article and Find Full Text PDFArticle Synopsis
- The study assessed how a yeast product enriched with herbs, malt, honey, and orange syrup affects the semen quality and oxidative status in stallions over 10 weeks.
- Twenty stallions were divided into a treatment group receiving the yeast supplement and a control group given a placebo, with semen collected weekly for analysis.
- Results showed that the treatment improved antioxidant levels in semen after storage, suggesting potential benefits for preserving cooled stallion semen, although other semen and blood parameters did not show significant differences between the groups.