TY  - JOUR
T1  - Evaluation of Protocols Based on Synthetic Progesterone and Gonadotropin 
  on Estrus and Ovulatory Response in Thai-Native Goats
AU - Navanukraw, Chainarong AU - Lertchunhakiat, Krittiya AU - Thammasiri, Jiratti AU - Jaikan, Winai AU - Swannakorn, Apiradee AU - Moonmanee, Tossapol AU - A. Redmer, Dale 
JO  - Journal of Animal and Veterinary Advances
VL  - 11
IS  - 18
SP  - 3385
EP  - 3389
PY  - 2012
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2012.3385.3389
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2012.3385.3389
KW  - Estrus synchronization
KW  -medroxyprogesterone
KW  -gonadotropin
KW  -Thai-native goat
KW  -ovulatory response
KW  -Thailand
AB  - The efficiency of protocols based on synthetic progesterone (Medoxy Progesterone Acetate; MAP) and gonadotropins (PMSG/FSH) for estrus synchronization was evaluated in Thai-native goats. Nulliparous goats (n = 36) were randomly assigned to 3 treatments. Treatment 1 (14 days MAP and PMSG); goats were synchronized using 60 mg MAP for 14 days combined with 300 IU PMSG administration 24 h before MAP removal. Treatment 2 (7 days MAP and PMSG); goats received MAP for 7 days combined with 300 IU PMSG administration 24 h before MAP removal and 5 mg PGF<SUB>2&#945;</SUB> administration at MAP removal. Treatment 3 (14 days MAP and FSH), goats received MAP for 14 days combined with 3 days of FSH injections in decreasing doses (24 mg total) beginning on day 12 of MAP treatment. Percentage of estrus was 100% detected in goats receiving 14 days MAP and PMSG or 7 days MAP and PMSG whereas 83.3% was observed in goats receiving 14 days MAP and FSH (p&gt;0.05). Time from MAP removal to onset of estrus was significantly advanced (p&lt;0.05) in goats receiving 14 days MAP and FSH (27.8&plusmn;2.3 h) when compared to goats receiving 7 days MAP and PMSG (42.0&plusmn;3.5 h). Duration of estrus was longer in goats receiving 14 days MAP and PMSG (34.0&plusmn;3.3 h) than those receiving 7 days MAP and PMSG (24.0&plusmn;2.1 h; p&lt;0.05). Results indicate that estrus and ovulatory response of Thai-native goats are not different among protocols, however the use of 14 days MAP and FSH led to shorter interval to onset of estrus than the use of 7 or 14 days MAP and PMSG.
ER  -