Effet d'une préstimulation ovarienne en début de cycle sur la réponse au traitement de superovulation chez la vache

in Annales de Médecine Vétérinaire (1989), 133

In this study, we have induced superovulation in 67 heifers according to a known based treatment based on the administration of 32 mg (Armour Units) of FSH/LH (ratio LH/FSH=20%). The animals were divided ... [more ▼]

In this study, we have induced superovulation in 67 heifers according to a known based treatment based on the administration of 32 mg (Armour Units) of FSH/LH (ratio LH/FSH=20%). The animals were divided in two groups: 30 control and 37 receiving 2.5mg (Armour units) of pure FSH on the third day and the fourth day of the estrous cycle. This pretreatment ("priming") was followed by a larger number of total (11.7 versus 6.4) and transferable (7.1 versus 3.6) embryos. This experiment demonstrates the efficiency of low doses of pure FSH administered 6 or 8 dyas before a superovulation in the final selection of ovarian follicles. [less ▲]