

Registro Completo 
Biblioteca(s): 
Embrapa Caprinos e Ovinos. 
Data corrente: 
12/04/1996 
Data da última atualização: 
12/04/1996 
Autoria: 
GINTHER, O. J.; KOT, K.; WILT BANK, M. C. 
Título: 
Association between emergence of follicular waves and fluctuations in cycle in ewes. 
Ano de publicação: 
1995 
Fonte/Imprenta: 
Theriogenology, v.43, n.3, p.689703, 1995. 
Idioma: 
Inglês 
Conteúdo: 
Folliculogenesis was studied daily in 16 interovulatory intervals in 5 Polypay ewes from mid February through April using transrectal ultrasonic imaging. The 3mm follicles attaining >=5 mm on Days 1 (ovulation=Day 0) to 11 showed significant peak numbers on Days 0, 5 and 10. The number of 3 and 4mm follicles that did not reach >4 mm was not significant, indicating that these follicles did not manifest a wave pattern. A follicular wave was defined as one or more follicles growing to >=5 mm; the day the follicles were 3 mm was the day of wave emergence, and the first wave after ovulation was Wave 1. Waves 1, 2 and 3 emerged on Days 1 to 2, 4 to 7 and 8 to 10, respectively. Four interovulatory intervals in April were short (9 to 14 d), indicating the end of the ovulatory season. ln the remaining 12 intervals, the ovulatory wave was Wave 3 in one interval, Wave 4 in 8 intervals, and Wave 5 or 6 in 3 intervals. The ovulatory wave followed the rhythmic pattern of Waves 1 to 3 by emerging on Days 11 to 14 in 50% of the intervals. ln the remaining intervals, either the ovulatory wave was Wave 4 but did not emerge until Day 16 or otqer waves intervened between Wave 3 and the ovulatory wave. The longest intervals (22, 24 and 14 d) had >4 waves. Based on a cycledetection program, peak values of FSH fluctuations were temporally associated with the emergen? pf waves as indicated by the following: 1) tendency (P<0.08) for an increase in FSH concentrations between 3 and 2 days before emergence of a wave; 2) close agreement between mean number of waves per interval (mean + SEM, 4.1 + 0.3) and mean number of identified FSH fluctuations (4.5 + 0.3); 3) close agreement in length of interwave intervals (4.0 + 0.3) and interpeak (FSH) intervals (3.6 + 0.2); 4) positive correlation (r2=O.8) for number of the 2 events (follicular waves and FSH fluctuations) within intervals; and 5) a closer (P<0.01) temporal relationship between the 2 events than would have been expected if the events were independent. The results support a relationship between transient increases in FSH con?ntrations and emergen? of follicular waves throughout the interovulatory interval in Polypay ewes, with the 2 events occurring approximately every 4 d. MenosFolliculogenesis was studied daily in 16 interovulatory intervals in 5 Polypay ewes from mid February through April using transrectal ultrasonic imaging. The 3mm follicles attaining >=5 mm on Days 1 (ovulation=Day 0) to 11 showed significant peak numbers on Days 0, 5 and 10. The number of 3 and 4mm follicles that did not reach >4 mm was not significant, indicating that these follicles did not manifest a wave pattern. A follicular wave was defined as one or more follicles growing to >=5 mm; the day the follicles were 3 mm was the day of wave emergence, and the first wave after ovulation was Wave 1. Waves 1, 2 and 3 emerged on Days 1 to 2, 4 to 7 and 8 to 10, respectively. Four interovulatory intervals in April were short (9 to 14 d), indicating the end of the ovulatory season. ln the remaining 12 intervals, the ovulatory wave was Wave 3 in one interval, Wave 4 in 8 intervals, and Wave 5 or 6 in 3 intervals. The ovulatory wave followed the rhythmic pattern of Waves 1 to 3 by emerging on Days 11 to 14 in 50% of the intervals. ln the remaining intervals, either the ovulatory wave was Wave 4 but did not emerge until Day 16 or otqer waves intervened between Wave 3 and the ovulatory wave. The longest intervals (22, 24 and 14 d) had >4 waves. Based on a cycledetection program, peak values of FSH fluctuations were temporally associated with the emergen? pf waves as indicated by the following: 1) tendency (P<0.08) for an increase in FSH concentrations between 3 and 2 days before... Mostrar Tudo 
PalavrasChave: 
Ciclio Estralfoliculo; Genese. 
Thesagro: 
Ovino; Reprodução. 
Categoria do assunto: 
 
Marc: 
LEADER 02772naa a2200193 a 4500 001 1516411 005 19960412 008 1995 bl uuuu u00u1 u #d 100 1 $aGINTHER, O. J. 245 $aAssociation between emergence of follicular waves and fluctuations in cycle in ewes. 260 $c1995 520 $aFolliculogenesis was studied daily in 16 interovulatory intervals in 5 Polypay ewes from mid February through April using transrectal ultrasonic imaging. The 3mm follicles attaining >=5 mm on Days 1 (ovulation=Day 0) to 11 showed significant peak numbers on Days 0, 5 and 10. The number of 3 and 4mm follicles that did not reach >4 mm was not significant, indicating that these follicles did not manifest a wave pattern. A follicular wave was defined as one or more follicles growing to >=5 mm; the day the follicles were 3 mm was the day of wave emergence, and the first wave after ovulation was Wave 1. Waves 1, 2 and 3 emerged on Days 1 to 2, 4 to 7 and 8 to 10, respectively. Four interovulatory intervals in April were short (9 to 14 d), indicating the end of the ovulatory season. ln the remaining 12 intervals, the ovulatory wave was Wave 3 in one interval, Wave 4 in 8 intervals, and Wave 5 or 6 in 3 intervals. The ovulatory wave followed the rhythmic pattern of Waves 1 to 3 by emerging on Days 11 to 14 in 50% of the intervals. ln the remaining intervals, either the ovulatory wave was Wave 4 but did not emerge until Day 16 or otqer waves intervened between Wave 3 and the ovulatory wave. The longest intervals (22, 24 and 14 d) had >4 waves. Based on a cycledetection program, peak values of FSH fluctuations were temporally associated with the emergen? pf waves as indicated by the following: 1) tendency (P<0.08) for an increase in FSH concentrations between 3 and 2 days before emergence of a wave; 2) close agreement between mean number of waves per interval (mean + SEM, 4.1 + 0.3) and mean number of identified FSH fluctuations (4.5 + 0.3); 3) close agreement in length of interwave intervals (4.0 + 0.3) and interpeak (FSH) intervals (3.6 + 0.2); 4) positive correlation (r2=O.8) for number of the 2 events (follicular waves and FSH fluctuations) within intervals; and 5) a closer (P<0.01) temporal relationship between the 2 events than would have been expected if the events were independent. The results support a relationship between transient increases in FSH con?ntrations and emergen? of follicular waves throughout the interovulatory interval in Polypay ewes, with the 2 events occurring approximately every 4 d. 650 $aOvino 650 $aReprodução 653 $aCiclio Estralfoliculo 653 $aGenese 700 1 $aKOT, K. 700 1 $aWILT BANK, M. C. 773 $tTheriogenology$gv.43, n.3, p.689703, 1995.
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Embrapa Caprinos e Ovinos (CNPC) 

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