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The objective of this study was to evaluate the efficacy of a combined treatment based on intravaginal progesterone on the induction of estrus in crossbred cows in Cameroon. A total of 116 Gudali (Bos indicus) x Charolais (Bos taurus) cows having calved at least once, without prior diseases, with a body condition score higher than 2, were selected from farms in Vina Department (Nyambaka District). They were gathered on the same ranch and divided into groups of 10 animals. The heat induction and synchronization protocol consisted of the insertion of a progesterone-based intravaginal device (Prid Delta) for eight to nine days. Twenty-four hours before its removal, an injection of five milliliters of prostaglandin F2alpha (Dinoprost, Enzaprost) was administered. At the time of withdrawal, 500 IU of equine chorionic gonadotropin was injected. Fifty-six hours after withdrawal, insemination was performed at the same fixed time with semen from Gyr and Brahman bulls. The rates of estrus induction and synchronization, intravaginal device retention, pregnancy at first insemination, fertility, and abortion were 100%, 100%, 56.0%, 51.7%, and 4.3% (as % of treated cows), respectively. Prid Delta was shown to be effective in inducing heat and obtaining pregnancyin Gudali x Charolais cows.

revue d'élevage et de médecine vétérinaire des pays tropicaux/revue d'élevage et de médecine vétérinaire des pays tropicaux

Efficacité d’un traitement intravaginal à base de progestérone chez des vaches croisées &lt;em&gt; Bos indicus &lt;/em&gt; x &lt;em&gt; Bos taurus &lt;/em&gt;