Embryonic mortality in buffaloes synchronized and mated by AI during the seasonal decline in reproductive function

Campanile, Giuseppe; Neglia, Gianluca; Galiero, Giorgio; Prandi, Alberto; Palo, R. Di; D’Occhio, Michael J.; Zicarelli, L.

doi:10.1016/j.theriogenology.2004.10.012

Cited by 115 publications

(82 citation statements)

References 15 publications

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“…Synchronization pregnancy rate was higher in TRT2 group compared to TRT1 group (68% vs. 44%, P<0.03). However, resynchronization pregnancy rate (78%), percent of embryonic and fetal losses (12%), less and similar result, reports by Vale et al 1989, Campanile et al 2005. The final cumulative pregnancy rate without and with embryonic and fetal losses (93% and 85%) were similar between treatments.…”

Section: Materials and Methods Third And Four Trialsupporting

confidence: 83%

Artificial Insemination at Fixed Time in Bufalloes

Crudeli¹,

Sota²

2011

Artificial Insemination in Farm Animals

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Section: Materials and Methods Third And Four Trialsupporting

confidence: 83%

Artificial Insemination at Fixed Time in Bufalloes

Crudeli¹,

Sota²

2011

Artificial Insemination in Farm Animals

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“…It is highly likely that embryonic mortality had occurred in these two animals under the influence of severe heat stress condition. The experiment by Campanile et al (2005) demonstrated that embryonic mortality occurred in 45% of buffaloes between days 26 and 40 of pregnancies following TAI after ovsynch treatment. Embryonic mortality increased in number of species following exposure of the mother to elevated ambient temperatures especially in tropical areas (Hafez 2000).…”

Section: Discussionmentioning

confidence: 99%

Changes in endocrine profiles during ovsynch and ovsynch plus norprolac treatment in Murrah buffalo heifers at hot summer season

Roy

Prakash

2008

Trop Anim Health Prod

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The aim of this study was to compare the changes in hormonal profiles during ovsynch and ovsynch plus norprolac treatment in Murrah buffalo heifers following timed artificial insemination (TAI) at stressful summer months, through intensive endocrine analysis. The norprolac (an anti-prolactin drug) at the dose rate of 10.0 mg/animal /day effectively suppressed the level of prolactin upto 30 hours. The hormones quantified in blood plasma samples collected before, during and after ovsynch and ovsynch plus norprolac treatment were LH, prolactin, progesterone, estradiol-17beta and total estrogens. The plasma prolactin and progesterone concentrations were negatively correlated (r = - 0.24) during summer estrous cycle, which indicated prolactin-induced suppression of progesterone secretion through poor luteal development. The ovsynch treatment reduced the incidence of anestrous from 45% before treatment to only 18% after treatment. The norprolac induced prolactin suppression improved the efficiency of ovsynch treatment upto 100% cyclicity after treatment in comparison to 36% acyclicity before treatment. In both the treatments 45% and 55% of animal became pregnant after TAI, respectively. The high prolactin secretion contributed to poor fertility by lowering gonadal hormones (estradiol-17beta, total estrogens and progesterone) production in summer months. This finding of endocrine changes suggests that ovsynch protocol for estrus synchronization has potential application for improvement of fertility in repeat breeding buffaloes even during extreme summer months through suppression of prolactin secretion.

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“…Estrus synchronization has been used in buffalo to increase conception rates during seasonal depression in fertility (Campanile et al, 2005). In artificial insemination programs, pregnancy rates after synchronization were ∼ 30% (Neglia et al, 2003).…”

Section: Discussionmentioning

confidence: 99%