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Seventy-five female Damascus goats aged between 1.5 and 5.5 years were used to evaluate the effectiveness of the intravaginal sponges and prostaglandin analogue on oestrous synchronization and fecundity; to diagnose pregnancy and to monitor the resumption of the luteal activity. Females were divided randomly, during the breeding season, into three equal groups, S, P and C. Females in group S were fitted with sponges containing 45 mg of flugestone acetate (FGA) for 14 days and injected with pregnant mare serum gonadotrophin (PMSG) at the sponge withdrawal. Females in group P were given two injections of prostaglandin F2alpha analogue at 11-day intervals, whereas females in group C (control) received no treatment. The results showed that there was a significant difference (p < 0.001) in oestrous exhibition between females in group S as compared with those in groups P and C, with means being 30 +/- 10, 172 +/- 115 and 217 +/- 75 h for groups S, P and C, respectively. Kidding rates resulting from the first and all matings were 80 and 88, 52 and 88, and 68 and 80% for groups S, P and C, respectively. Fecundity rates were 215, 175 and 180% for groups S, P and C, respectively, with a significant difference (p < 0.05) between the S and both P and C groups. Using an ultrasound pregnancy detector performed on days 57 +/- 3 after mating, positive pregnancy diagnosis was 93.3% and 100% for non-pregnancy. Females in the control group showed functional corpus luteum starting in September. It is concluded that FGA sponges plus PMSG treatment could be successfully used to synchronize oestrus and improve fecundity; whereas prostaglandin treatment was not effective to synchronize oestrus. It is also concluded that pregnancy can be diagnosed accurately and successfully using an ultrasound pregnancy detector. In addition, ovarian activity in the Damascus goat in Syria resumes in September.

ContentsFifty!nine female yearlings of local Awassi sheep were randomly divided into two groups[ Animals in group T "treated# were _tted with intravaginal sponges containing 59 mg of med! roxyprogesterone acetate for 03 days followed by 399 IU of pregnant mare|s serum gonadotrophin "PMSG# at sponge with! drawal\ whereas group C "control# received no treatment[ Oes! trus rate was 81[6 and 00[1) for groups T and C\ respectively[ Lambing rate was 67 and 4[5) for groups T and C\ respectively[ Twinning rate was 20[2) in group T compared to zero in group C[ Average birth weight for single born lambs "3[6 2 9[5 kg# was signi_cantly "p ³ 9[94# higher than twin born lambs "2[9 2 9[4 kg# in group T[ The average concentration of blood progesterone collected between days 06Ð08 after mating was 08[29 nmol:l and the accuracy of early pregnancy diagnosis was 099)[ It was concluded that\ it is possible to induce syn! chronized oestrus\ and to increase the twinning rate in Syrian Awassi sheep yearlings outside the breeding season\ using intra! vaginal sponges and PMSG[ In addition\ early pregnancy diag! nosis could be successfully determined in female Awassi sheep yearlings between days 06Ð08 after mating[ InhaltFru Ãhe Belegung und Tra Ãchtigkeitsdiagnose bei syrischen Awassi!Schaf!Ja Ãhrlingen Insgesamt 48 weibliche Ja Ãhrlinge einer lokalen Awassi! Schafrasse wurden zufa Ãllig auf zwei Gruppen aufgeteilt[ Tiere der Behandlungsgruppe "T# wurden mit Intravaginal! schwa Ãmmchen\ die 59 mg Medroxyprogesteronazetat enthiel! ten\ fu à r 03 Tage versehen[ Bei der Herausnahme der Schwa Ãmm! chen wurden 399 IE PMSG gegeben[ Die Kontrollgruppe "C# erhielt keine Behandlung[ Die O Ýstrusrate betrug 81\6) "T# und 00\1) "C#[ Die Ablammrate fu à r Gruppe T betrug 67)\ wohingegen sie in Gruppe C 4\5) erreichte[ Die Zwillingsrate betrug fu à r Gruppe T 20\2)\ in der Kontrollgruppe wurden keine Zwillinge geboren[ Das durchschnittliche Geburtsgewicht fu à r einzeln geborene La Ãmmer der Gruppe T war mit 3\6 2 9\5 kg signi_kant ho à her als bei Zwillingsgeburten "2\8 2 9\4 kg#[ Die durchschnittliche Blutprogesteronkonzen! trationen zwischen Tag 06 und 08 nach Bedeckung 08\2 nmol:l und die Genauigkeit der Tra Ãchtigkeitsdiagnose war 099)[ Es wird gefolgert\ da) es mo à glich ist\ einen synchronisierten O Ýstrus zu induzieren und die Zwillingsrate bei syrischen Awassischaf! Ja Ãhrlingen au)erhalb der Zuchtsaison mit Hilfe von Intravaginalschwa Ãmmchen und PMSG zu verbessern[ Au)er! dem kann die Tra Ãchtigkeit bei Awassischaf!Ja Ãhrlingen zwischen Tag 06 und 08 genau bestimmt werden[