Evaluation of Oestrus Response, Pregnancy Rate and Oestradiol-17β of Nigerian Goat Following Synchronisation with Prostaglandin F2α

Reproductive inefficiency is one of the most important and cost limiting factor to profitable small ruminant production in tropics. The aim this study was evaluate influence breed on oestrus response, reproductive oestradiol 17 β profiles Red Sokoto (RS), Sahelian (SH) West African Dwarf (WAD) goats following synchronisation with prostaglandin F2α (PGF2α). Thirty (N = 30) apparently healthy; RS (n 10), SH 10) WAD (n=10) goats, aged between 1.5 – 2.0 years, body condition score 3.0 4.0 were used for study. Each doe synchronised 1 mL (0.26 mg) cloprostenol sodium (Synchromate®) given as a single intra-muscular injection Day 0. Prior synchronisation, 5mL blood sample collected from each 0, (pre- sample) subsequently 1, 2 3 post-synchronisation determination serum oestradiol17β profiles. findings follows: Oestrus response rates (%): RS; 100.0; SH; WAD; 0.0; pregnancy rate 70.0; 20.0; 0.0. Sahelians that kidded (SHK) had significantly higher (P < 0.05) progesterone concentration than did not kid (SHN); (RSK) (P< concentrations oestradiol-17β (RSN); RSK SHN 0.05). It is, therefore, concluded that: responded better PGF2α-based WAD. Oestradiol-17β activity comparatively PGF2α. completely non-responsive therefore recommended goat will require more time (approximately 6 months) adapt Northern Guinea Zone their hypothalamo-pituitary- Ovarian axis be activated sufficiently cycle, ovulate develop functional corpus luteum respond