title: [Strategic hormonal reproductive programs in cows. Part 1: overview, Ovsynch and its modifications].
abstract: BACKGROUND
  Description of different hormonal reproductive programs in cows.
  
  
  METHODS
  Literature review.
  
  
  RESULTS
  The underlying physiological principles and the implementation of hormonal programs based on the use of prostaglandins and combinations of prostaglandins with GnRH analogues are presented. In this context, the advantages and disadvantages of each program are explained. Based on the Ovsynch program, its modifications, Cosynch, Select Synch, Heatsynch and Ultrasynch, are described.
  
  
  CONCLUSIONS
  The description of the different reproductive programs is designed to assist the attending veterinarian in choosing the optimum strategy for each farm.
authors: Klinikum Veterinärmedizin, Klinik für Gynäkologie, Geburtshilfe und Andrologie der Groß- und Kleintiere mit Tierärztlicher Ambulanz, Justus-Liebig-Universität Gießen, Frankfurter Straße 106, 35392 Gießen.
authors: C
authors: C
authors: Schmidt
authors: Z
authors: Z
authors: Gajewski
authors: A
authors: A
authors: Wehrend
mesh_terms: D000822:Animal Husbandry / Q000379:methods*; D000818:Animals; D001947:Breeding / Q000379:methods*; D002417:Cattle / Q000502:physiology*; D004973:Estrus Synchronization; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage / Q000031:analogs & derivatives; D006728:Hormones / Q000008:administration & dosage*; D011453:Prostaglandins / Q000008:administration & dosage
chemical_list: D006728:Hormones; D011453:Prostaglandins; D007987:Gonadotropin-Releasing Hormone