• Publications
  • Influence
Role of vascular endothelial growth factor in ovarian physiology - an overview.
In the female reproductive system, angiogenesis occurs as a normal process and is essential for normal tissue growth and development, and VEGF is thought to be important for the persistence of the CL function for a longer than in the nonfertile cycle period of time. Expand
Ovarian function in ruminants.
Important steps of ovarian regulation during follicle development, ovulation and the life span of corpus luteum (CL) in ruminants are highlighted to highlight the importance of growth factors especially of insulin-like growth factor, vascular endothelial growth factor and fibroblast growth factor for development and completion of a dense network of capillaries during follicles growth and CL formation. Expand
Machine milking of Ostfriesian and Lacaune dairy sheep: udder anatomy, milk ejection and milking characteristics.
It is concluded that milk ejection in ewes occurred in response to elevated oxytocin concentrations, and probably because a larger volume of the cistern was located below the teat exit in the Ostfriesian breed, stripping yield was higher in OstFriesian than in Lacaune sheep. Expand
Expression and Tissue Concentration of Vascular Endothelial Growth Factor, Its Receptors, and Localization in the Bovine Corpus Luteum During Estrous Cycle and Pregnancy1
The high VEGF mRNA expression and protein levels during matured vasculature in the mid-stage CL and pregnancy also suggest also a survival function for endothelial cells. Expand
The expression of leptin and its receptor during different physiological stages in the bovine ovary
The results are the first to demonstrate the possible involvement of locally produced leptin/Ob‐R system in the bovine ovary, suggesting roles in the function and/or development of the CL and growth of small follicles in an autocrine/paracrine fashion. Expand
Regulation of corpus luteum function in cattle--an overview.
  • D. Schams, B. Berisha
  • Biology, Medicine
  • Reproduction in domestic animals = Zuchthygiene
  • 1 August 2004
Important steps of regulation during the lifetime of CL are stressed to stress the importance and regulation of angiogenesis and blood flow during CL formation and the regulation of function by endocrine/paracrine- and autocrine-acting regulators is discussed. Expand
Expression and localisation of vascular endothelial growth factor and basic fibroblast growth factor during the final growth of bovine ovarian follicles.
The results suggest that VEGF and FGF families are involved in the proliferation of capillaries that accompanies the selection of the preovulatory follicle resulting in an increased supply of nutrients and precursors, and therefore supporting the growth of the dominant follicle. Expand
Pulsatile secretion of gonadotrophins, ovarian steroids and ovarian oxytocin during the luteal phase of the oestrous cycle in the cow.
It is concluded that separate FSH pulses are secreted in addition to parallel LH and F SH pulses during the mid-luteal phase of the oestrous cycle; therefore, the frequency of secretion of LH may be modulated to a greater extent by ovarian steroids than is FSH pulse frequency. Expand
The expression of the IGF family and GH receptor in the bovine mammary gland.
High mammary IGFR-1 mRNA during lactation suggests a role for peripheral IGF-I in maintenance of lactation, and locally produced IGF- I and -II may mediate mammogenesis. Expand
Continuously elevated concentrations of oxytocin during milking are necessary for complete milk removal in dairy cows.
Continuously elevated OT concentrations such as those during infusion or during normal milking are necessary for complete milk removal in primiparous dairy cows with inherent disturbed milk ejection. Expand