Effect of Embryo Transfer following Artificial Insemination (ETFAI) on Reproductive Performance in Dairy Cows in South-Western Japan

Tani, Mineto; Hayashida, Takuya; Tomokawa, Kouichiro; Mito, Yasuaki; Funakoshi, Daisuke; Tani, Chikako; Sakatani, Miki; Takahashi, Masashi; Kitahara, Go; Kamimura, Shunichi

doi:10.1292/jvms.09-0401

Cited by 6 publications

(10 citation statements)

References 13 publications

(21 reference statements)

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“…Posisi embrio dengan metode IB-TE masih diperdebatkan. Tani et al (2010) melaporkan bahwa IB-TE akan menghasilkan kelahiran kembar lebih tinggi, dengan cara contralateral dimana TE dilakukan pada posisi berlawanan dengan letak Corpus Luteum (CL), dibandingkan ipsilateral atau searah dengan CL (58% vs 32%). Tetapi Yoon et al (2012) menganjurkan sebaliknya bahwa untuk menghasilkan anak kembar IB-TE sebaiknya posisi embrio ipsilateral.…”

Section: Kombinasi Ib-teunclassified

Factors Affecting Twinning and the Impacts of Twinning in Cattle

Praharani

2019

WARTAZOA

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Efforts to increase cattle production can be done through increasing the population and productivity of cattle, one of which is through the birth of two offsprings per parent (twin). The incidence of twinning in cattle ranged 1-10%, and influenced by genetic/breed, parity, management, season of breeding. This paper presented factors and technology that increase twinning rate and the impacts of twin births in cattle. There are genetic and non genetic factors affecting twinning rate. Increased twin births can be done through some technologies such as selection, reproduction and management. The problems in twinnings are the high incidence of abortion, early embryonic loss, distochia, retained placenta, metabolic disorders, and ketosis resulting in longer calving interval. Intensive management to dam bearing twins can reduce the problems. Economically, the profits of twinning are different between beef and dairy cattle. Twin births give benefit to beef cattle farming through the increase in total weaning per cattle. The pros and cons of twin births occur in dairy cows farming, especially on milk production.

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Section: Kombinasi Ib-teunclassified

Factors Affecting Twinning and the Impacts of Twinning in Cattle

Praharani

2019

WARTAZOA

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“…1999). In Kumamoto Prefecture where it is very hot in summer, transfer of an IVP Japanese Black embryo following AI of Holstein semen in dairy cows resulted in greater pregnancy rates than those after conventional AI (Tani et al . 2010).…”

Section: Embryo Transfer To Overcome Heat Stressmentioning

confidence: 99%

“…In Florida, USA, a Tdb of 29.7°C was associated with an average rectal temperature of 39°C (mild hyperthermia), and a Tdb of 31.4°C was associated with an average rectal temperature of 39.5°C (Dikmen & Hansen 2009). Using dairy cows in south-western Japan (Kumamoto prefecture), Tani et al (2010) reported that pregnant cows had lower rectal temperature than non-pregnant cows at day 7 (38.7°C vs. 39.4°C, P < 0.05) or 8 (38.8°C vs. 39.1°C, P < 0.05) after artificial insemination (AI). Probably the best method for assessing HS is to measure rectal temperatures and respiration rates during the afternoon in a few sentinel cows.…”

Section: Evaluation Indices Of the Magnitude Of Hs In Summermentioning

confidence: 99%

“…Compared to artificial insemination (AI), pregnancy rates for cows exposed to HS have been improved by transfer of either unfrozen embryos produced by superovulation (Ambrose et al 1999;Demetrio et al 2006) or in vitro production (IVP) (Al-Katanani et al 2002b;Stewart et al 2011) or by transfer of cryopreserved embryos produced by superovulation (Ambrose et al 1999). In Kumamoto Prefecture where it is very hot in summer, transfer of an IVP Japanese Black embryo following AI of Holstein semen in dairy cows resulted in greater pregnancy rates than those after conventional AI (Tani et al 2010). On the other hand, ET has not improved pregnancy rates when cryopreserved embryos produced by in vitro were transferred (Al-Katanani et al 2002b;Stewart et al 2011).…”

Section: Embryo Transfer To Overcome Heat Stressmentioning

confidence: 99%

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Perspectives on improvement of reproduction in cattle during heat stress in a future Japan

Kadokawa

Sakatani

Hansen

2012

Animal Science Journal

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Heat stress (HS) causes hyperthermia, and at its most severe form, can lead to death. More commonly, HS reduces feed intake, milk yield, growth rate and reproductive function in many mammals and birds, including the important cattle breeds in Japan. Rectal temperatures greater than 39.0°C and respiration rates greater than 60/min indicate cows are undergoing HS sufficient to affect milk yield and fertility. HS compromises oocyte quality and embryonic development, reduces expression of estrus and changes secretion of several reproductive hormones. One of the most effective ways to reduce the magnitude of HS is embryo transfer, which bypasses the inhibitory effects of HS on the oocyte and early embryo. It may also be possible to select for genetic resistance to HS. Cooling can also improve reproductive performance in cows and heifers, and probably, the most effective cooling systems currently in use are those that couple evaporative cooling with tunnel ventilation or cross ventilation. Its effect on improving reproductive performance in Japan remains to be evaluated.

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“…In Japan, transferring beef cattle embryos to dairy cattle is a common means of augmenting income among farmers and also avoids accidents associated with delivery in heifers [ 25 ]. It is effective for producing thermotolerant embryos that can be implanted after embryo transfer even under high temperatures.…”

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confidence: 99%

Heat shock decreases the embryonic quality of frozen-thawed bovine blastocysts produced <i>in vitro</i>

Mori

Hayashi

Isozaki

et al. 2015

Journal of Reproduction and Development

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In this study, the effect of heat shock on frozen-thawed blastocysts was evaluated using in vitro-produced (IVP) bovine embryos. In experiment 1, the effects of 6 h of heat shock at 41.0 C on fresh blastocysts were evaluated. HSPA1A expression as a reflection of stress was increased by heat shock (P < 0.05), but the expressions of the quality markers IFNT and POU5F1 were not affected. In experiment 2, frozen-thawed blastocysts were incubated at 38.5 C for 6 h (cryo-con) or exposed to heat shock at 41.0 C for 6 h (cryo-HS). Then, blastocysts were cultured at 38.5 C until 48 h after thawing (both conditions). Cryo-HS blastocysts exhibited a decreased recovery rate: HSPA1A expression was dramatically increased compared with that in fresh or cryo-con blastocysts at 6 h, and IFNT expression was decreased compared with that in cryo-con blastocysts at 6 h (both P < 0.05). Cryo-con blastocysts at 6 h also exhibited higher HSPA1A expression than fresh blastocysts (P < 0.05). At 48 h after thawing, the number of hatched blastocysts and blastocyst diameter were lower in cryo-HS blastocysts (P < 0.05). Cryo-con blastocysts showed lower POU5F1 levels at 48 h than fresh, cryo-con or cryo-HS blastocysts at 6 h (P < 0.05), but their POU5F1 levels were not different from those of cryo-HS blastocysts at 48 h. These results indicated that application of heat shock to frozen-thawed blastocysts was highly damaging. The increase in damage by the interaction of freezing-thawing and heat shock might be one reason for the low conception rate in frozen-thawed embryo transfer in summer.

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Effect of Embryo Transfer following Artificial Insemination (ETFAI) on Reproductive Performance in Dairy Cows in South-Western Japan

Cited by 6 publications

References 13 publications

Factors Affecting Twinning and the Impacts of Twinning in Cattle

Factors Affecting Twinning and the Impacts of Twinning in Cattle

Perspectives on improvement of reproduction in cattle during heat stress in a future Japan

Heat shock decreases the embryonic quality of frozen-thawed bovine blastocysts produced <i>in vitro</i>

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