No abstract

________________________________________________________________________________ AbstractThe objective of this study was to evaluate the effect of a progestagen treatment (fluorogestone acetate sponge) alone or in combination with equine chorionic gonadotrophin (eCG) on oestrus response in Red Sokoto (RS) goats. One hundred RS does were treated with 30 mg fluorogestone acetate (FGA) sponges for 14 days. At the end of the progestagen treatment, does that retained the sponges were allocated to two groups; FGAeCG and FGA. The FGAeCG group (n = 28) received 200 IU eCG i.m. concurrently with the sponge removal, while the FGA group (n = 28) did not receive eCG at sponge removal. Oestrus was detected twice daily (at 07:00 -10:00 and 15:00 -18:00) using sexually active bucks for five days following progestagen withdrawal. There was no significant difference in oestrus response between groups FGAeCG (82.1%) and FGA (78.6%). There was a significant difference in the time to the onset (29.3 ± 4.6 and 44.2 ± 6.3 h for the FGAeCG and FGA, respectively) and duration of the induced oestrus period (38.9 ± 5.1 and 22.7 ± 4.6 h for the FGAeCG and FGA groups, respectively). It is concluded that although both groups showed good oestrus synchronization rates, administration of eCG shortened the time to onset of oestrus and increased the duration of oestrus in Red Sokoto does. ________________________________________________________________________________

No abstract

The objective of the present study was to evaluate the effect of a progestagen treatment alone or in combination with equine chorionic gonadotrophin (eCG) on estrus response in Sahel (SH) goats. One hundred (n=100) SH does were treated with 30 mg fluorogestone acetate (FGA) sponge for 14 days. At the end progestagen treatment, does that retained the intravaginal pessary were allocated into two groups; A: FGA & eCG (n=42) and B: FGA (n=41). Does in group A received additional 200 IU eCG i.m. concurrent with sponge removal. Estrus was detected twice daily (at 07.00 -10.00 and 15.00 -18.00 h) using sexually active bucks for 5 days after pessary removal. Estrus response was different (p<0.05) between A (73.8 %) and B (58.5 %). Estrus onset for group A and B (Mean ± S.E.M.) was 27.9 ± 8.3 and 38.4 ± 9.6 h while estrus duration (Mean ± S.E.M.) for group A and B was 35.8 ± 3.2 and 23.1 ± 5.2 h, respectively. Estrus onset and duration of estrus were different (p<0.05) between group A ( FGA & eCG) and B (FGA). It is concluded that additional eCG treatment following a 14-day progestagen (Fluorogestone acetate) treatment increased estrus response, hastened onset of estrus, lengthened duration of estrus and improved tightness of synchrony in Sahel does.

No abstract