Effect of stage of anestrus on the induction of estrus by the dopamine agonist cabergoline in dogs

Comparative efficacy of bromocriptine, cabergoline and thyroxine in inducing oestrus in bitches

“…The mean duration of induced proestrus and oestrus was lowest on induction with bromocriptine and highest with thyroxine at 10 μg/kg body weight. Jeukenne and Verstegen (1997), Verstegen et al (1999) and Gobello et al (2004) reported that the duration of proestrus and oestrus in induced and spontaneous cycles were similar. The duration of proestrus and oestrus obtained in the present study is in agreement with that of the earlier reports based on cytology (Jeukenne and Verstegen 1997;Verstegen et al 1999;Gobello et al 2004).…”

“…Jeukenne and Verstegen (1997), Verstegen et al (1999) and Gobello et al (2004) reported that the duration of proestrus and oestrus in induced and spontaneous cycles were similar. The duration of proestrus and oestrus obtained in the present study is in agreement with that of the earlier reports based on cytology (Jeukenne and Verstegen 1997;Verstegen et al 1999;Gobello et al 2004). The accuracy of trans-abdominal ultrasonography and abdominal palpation in diagnosing early pregnancy reached 100 and 88.89 per cent respectively as the gestational age advanced from 20-25 days to 30-35 days post-breeding.…”

“…The proestrous response reported by vanHaaften et al (1989) and Zoldag et al (2001) in oestrus induction trials using bromocriptine were 80 and 100 per cent respectively. Verstegen et al (1999) reported a proestrus response of 93.33 per cent in bitches treated with cabergoline. Ajitkumar et al (2005) obtained a proestrus response of 70 per cent in a preliminary study on oestrus induction using levothyroxine.…”

“…Thyroxine Domestic bitches are non-seasonally monoestrous and as a result of this unique reproductive physiology, they exhibit cyclicity only once or twice in a year. The length of oestrous cycle in the bitch is considerably longer than that in most other domestic species and unique in that there is an obligatory anoestrus following the termination of the luteal phase (Verstegen et al 1999). Bouchard et al (1991) and Concannon (1993) reported a non-seasonal anoestrus of variable duration (2 to 10 months) following each oestrous cycle in bitch.…”

“…Bouchard et al (1991) and Concannon (1993) reported a non-seasonal anoestrus of variable duration (2 to 10 months) following each oestrous cycle in bitch. According to Verstegen et al (1999), the anoestrus varied in duration from 3 to Vet Res Commun (2010) 34:65-69 …”