The effects of GnRH administration postinsemination on serum concentrations of progesterone and pregnancy rates in dairy cattle exposed to mild summer heat stress

Willard, Scott T.; Gandy, Scott; Bowers, S.; Graves, Kenneth; Elias, Alexander; Whisnant, C.S.

doi:10.1016/s0093-691x(02)01232-3

Cited by 61 publications

(41 citation statements)

References 28 publications

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“…Toelihere (1977) (Sutiyono et al, 1999) Rendahnya konsentrasi hormon progesteron berdampak terhadap rendahnya angka konsepsi (Mann dan Lamming, 1992). Salah satu penyebab utama kematian embrio dini yang menjadi penyebab rendahnya angka konsepsi adalah tidak cukupnya fungsi luteal yang diindikasikan oleh rendahnya konsentrasi progesteron (Willard, et al 2003). (Toelihere, 1993 (Bearden dan Fuquay, 1980).…”

Section: Ereksi Uterusunclassified

Pengaruh Pemberian Pakan Flushing dan Non Flushing terhadap Intensitas Birahi dan Angka Kebuntingan Induk Sapi Potong

Rohmah

Ondho

Samsudewa

2017

JSPI.ID

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The aim of this research was to determine the effect of flushing and non-flushing on oestrous intensity and conception of the cow. There were 22 cows (12 SimPO, 10 LimPO) which were given the flushing treatment and 27 cows were given the non-flushing treatment. Treatments applied were T0 (Pennisetum purpurium + rice straw ± 30 kg), T1 (Pennisetum purpurium + rice straw ± 30 kg + concentrate 2 kg / head / day). The results showed that the score of vulva change, behavior and uterus erection of the cow which were given the flushing and nonflushing treatments respectively were 3; 2; 2; meanwhile the score of mucus secretion change of cow which were given the flushing treatment was 1 and non-flushing treatment was 1.5. The oestrous intensity of the cow which were given the flushing treatment have not shown clear performance on oestrous phase. The flushing treatment also did not give significant effect on the conception of the cow.Key words: cow, flushing, oestrous intensity, and conception. ABSTRAKPenelitian ini bertujuan untuk mengetahui intensitas birahi dan angka kebuntingan induk sapi potong yang diberi perlakuan flushing dan non flushing. Sebanyak 22 ekor induk sapi potong (12 ekor induk sapi SimPO, 10 ekor induk sapi LimPO) yang di flushing dan 27 ekor induk sapi potong (14 ekor induk sapi SimPO, 13 ekor induk sapi LimPO) yang diberi perlakuan non flushing. Perlakuan yang diujikan adalah T0 (rumput gajah+ jerami padi±30 kg) dan T1 (rumput gajah+ jerami padi ±30kg+ konsentrat 2kg/ekor/hari). Hasil penelitian menunjukkan bahwa skor perubahan vulva, tingkah laku dan ereksi uterus induk sapi potong yang diberi perlakuan flushing dan non flushing berturut-turut adalah 3; 2; 2 sedangkan skor perubahan sekresi lendir induk sapi potong yang diberi perlakuan flushing 1 dan non flushing yaitu 1,5. Intensitas birahi induk sapi potong yang diberi perlakuan flushing belum memperlihatkan penampilan jelas pada fase birahi. Perlakuan flushing juga tidak berpengaruh nyata terhadap angka kebuntingan induk sapi potong.Kata kunci: induk sapi potong, flushing, intensitas birahi, dan angka kebuntingan.

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Section: Ereksi Uterusunclassified

Pengaruh Pemberian Pakan Flushing dan Non Flushing terhadap Intensitas Birahi dan Angka Kebuntingan Induk Sapi Potong

Rohmah

Ondho

Samsudewa

2017

JSPI.ID

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“…However, seasonal variations are effective on cyclic activity as well as on reproduction in cows and heifers (MCNATTY et al 1984, PENNINGTON et al 1985, BORELL 2000, WHITE et al 2002. Environment temperature has an important role on reproductive performance (WILLARD et al 2003). High environment temperature and relative humidity influence endocrine activity and reduce reproductive efficiency (RYAN et al 1992, GREVE et al 1996, DEMİRCİ 2002, DERENSIS et al 2002, SARTORI et al 2002, SÖNMEZ et al 2005.…”

Section: Introductionmentioning

confidence: 99%

The effect of some seasonal conditions on oestrus occurrence in cows

Bülbül

Ataman

2009

Arch. Anim. Breed.

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In this study, the effect of climatic conditions on oestrus occurrence was investigated by using 9 972 oestrus records of cows recorded between 1995 and 2003. A distinct seasonal variation in the oestrus occurrence was determined. Oestrus occurrence observed in January, March, November and December was less than that in June and September (P<0.05). Annual distribution of the oestrus occurrence was positively correlated with environment temperature and insulation duration, but it was negatively correlated with rainfall (P<0.01). However, there was no relationship between oestrus occurrence and relative humidity. In addition to these, there was a slight decrease in the oestrus response when the temperature-humidity index (THI) was above 72; nevertheless, this decrease was not significant (P >0.05). The data presented in this study demonstrated that the increase in the environmental temperature up to 23 °C did not cause a suppressive effect on the ovarian activity. In conclusion, annual distribution of the oestrus occurrence is positively correlated with environment temperature and insulation duration whereas it is negatively correlated with rainfall in Holstein cows, in this study. Keywords: cattle, climatic conditions, oestrus response Zusammenfassung Einfluss der Jahreszeiten auf die Brunst bei KühenAn Hand von 9 927 Östrusdaten von Holsteinkühen aus den Jahren 1995 bis 2003 wurde der jahreszeitliche klimatische Einfluss auf das Brunstgeschehen bei Kühen untersucht. Grund war die Beobachtung einer saisonalen Veränderung des Östrusauftretens. So wurde ein geringeres Brunstauftreten in den Monaten Januar, März, November und Dezember gegenüber den Monaten Juni und September beobachtet. Die Datenanalyse ergab, dass signifikant das jahreszeitliche Östrusauftreten positiv mit der Umgebungstemperatur und der Sonnenscheindauer aber negativ mit der Niederschlagsmenge korreliert war. Keine Zusammenhänge fanden sich zwischen der relativen Luftfeuchtigkeit und dem Östrusgeschehen. Tendenziell wurde eine geringe Abnahme der Östren nachgewiesen, wenn der Wert des Temperatur-Feuchtigkeits-Indexes (THI) über 72 lag. Die Ergebnisse dieser Studie zeigen, dass Umgebungstemperaturen bis zu 23 °C die Ovarienaktivität nicht negativ beeinflussen. Zusammenfassend wird geschlussfolgert, dass bei dem vorliegenden Tiermaterial ein jahreszeitliches Östrusverhalten positiv mit BÜLBÜL and ATAMAN: The effect of some seasonal conditions on oestrus occurrence in cows 460 der Umwelttemperatur sowie der Sonnenscheindauer, jedoch negativ mit der Niederschlagsmenge korreliert ist.Schlüsselwörter: Kuh, Jahreszeit, Brunst

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“…In pregnant animals, mean P 4 concentrations were significantly greater in the Ovsynch'Post-AI group compared with the Ovsynch group on day 21 for heifers and day 28 for cows, indicating a response from the result of an accessory CL. Other studies have also observed increases in P 4 from Post-AI treatments of GnRH (Schmitt et al 1996;Willard et al 2003;Howard et al 2006).…”

Section: Discussionmentioning

confidence: 80%

Effects of presynchronization and postinsemination treatments on pregnancy rates to a timed breeding Ovsynch protocol in dairy cows and heifers

Gordon¹,

Dinn²,

Rajamahendran³

2010

Can. J. Anim. Sci.

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Gordon, M. B., Dinn, N. and Rajamahendran, R. 2010. Effects of presynchronization and postinsemination treatments on pregnancy rates to a timed breeding Ovsynch protocol in dairy cows and heifers. Can. J. Anim. Sci. 90: 35Á44. This study examined two strategies to improve pregnancy rate (PR) following Ovsynch timed artificial insemination (TAI) for lactating dairy cows (n0225) and nulliparous heifers (n 087). Animals were assigned randomly to receive one of three treatments: Ovsynch protocol (GnRH 7 d before and 48 h after one PGF 2a treatment), Presynch'Ovsynch (two treatments of PGF 2a 14 d apart followed by Ovsynch 14 d later), or Ovsynch'Post-AI GnRH (GnRH 6 d after Ovsynch TAI) for first service breeding. Pregnancy rates among treatments were not different in lactating cows (42.5, 48.0, and 44.9%) or heifers (65.5, 58.6, and 58.6%) for Ovsynch, Presynch'Ovsynch, and Ovsynch'Post-AI, respectively. Cows treated with Ovsynch had lower PR when bred B76 d in milk (DIM) compared with Presynch'Ovsynch or Ovsynch' Post-AI treatments. In addition, cows and heifers that received Post-AI GnRH had greater progesterone (P 4 ) concentrations on day 21 and day 28 post-TAI than the Ovsynch group. Animals with higher P 4 concentrations at initiation of Ovsynch had better PR than those with low P 4 concentrations. Presynch animals had a greater proportion of animals with P 4 values above 1 ng mL(1 at the initiation of Ovsynch than those animals in the Ovsynch group (74.5 vs. 59.4%). Heifers had lower PR if they were B14.6 mo of age (48.9 vs. 75%) or weighed B380 kg (47.4 vs. 70.8%). Although no significance differences in PR were observed between treatments in cows or heifers, DIM in cows and age and weight in heifers affected PR. ; Ovsynch'GnRH post-IA (GnRH 6 jours apre`s IATP par Ovsynch) pour une premie`re saillie. Le taux de conception des vaches en lactation (42,5%, 48,0% et 44,9%) et des ge´nisses (65,5%, 58,6% et 58,6%) ne varie pas avec le traitement (Ovsynch, Presynch'Ovsynch et Ovsynch'post-IA, respectivement). Les vaches recevant le traitement Ovsynch se caracte´risent par un TC plus faible quand on les accouple apre`s moins de 76jours de lactation, comparativement a`celles qui rec¸oivent le traitement Presynch'Ovsynch ou Ovsynch'post-IA. D'autre part, les vaches et les ge´nisses a`qui on administre de la GnRH post-IA pre´sentent une plus forte concentration de progeste´rone (P 4 ) que celles du groupe Ovsynch, le 21 e et le 28 e jour apre`s l'IATP. Les sujets qui pre´sentaient une plus forte concentration de P 4 au de´but du traitement Ovsynch avaient un TC supe´rieur a`ceux pre´sentant une faible concentration de P 4 . Le groupe Presynch comptait un plus grand nombre d'animaux ayant plus de 1 ng de P 4 par mL dans le sang au de´but du traitement Ovsynch que le groupe Ovsynch (74,5% c. 59,4%). Le taux de conception des ge´nisses est plus faible quand elle ont moins de 14,6 mois (48,9% c. 75%) ou pe`sent moins de 380 kg (47,4% c. 70,8%). Bien qu'on n'ait observe´aucun e´cart significatif dans le TC des vaches et ...

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The effects of GnRH administration postinsemination on serum concentrations of progesterone and pregnancy rates in dairy cattle exposed to mild summer heat stress

Cited by 61 publications

References 28 publications

Pengaruh Pemberian Pakan Flushing dan Non Flushing terhadap Intensitas Birahi dan Angka Kebuntingan Induk Sapi Potong

Pengaruh Pemberian Pakan Flushing dan Non Flushing terhadap Intensitas Birahi dan Angka Kebuntingan Induk Sapi Potong

The effect of some seasonal conditions on oestrus occurrence in cows

Effects of presynchronization and postinsemination treatments on pregnancy rates to a timed breeding Ovsynch protocol in dairy cows and heifers

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