Effect of Oxytocin and Epinephrine on the Conception Rate of Cows

Hays, R. L.; Demark, N.L. Van; Ormiston, E.E.

doi:10.3168/jds.s0022-0302(58)91101-9

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…In cattle only a few studies showing the effect of oxytocin on pregnancy rate at the time of AI were published (Hays et al, 1958;Yildiz 2005). In an early study, Hays et al (1958) showed that oxytocin treatment did not affect pregnancy rate in cows.…”

Section: Discussionmentioning

confidence: 99%

“…In an early study, Hays et al (1958) showed that oxytocin treatment did not affect pregnancy rate in cows. However, in a recent study, pregnancy rate was increased in lactating dairy cows after oxytocin administration just before AI, but the number of cows (n = 17) that were included in the study was very low (Yildiz, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Clitoral massage which probably releases oxytocin following artificial insemination increased pregnancy in beef cows but not in beef heifers or dairy cows (Randel et al, 1975;Cooper et al, 1984). The administration of oxytocin following AI also increased CR in lactating dairy cows (Yildiz, 2005) but in another study it had hardly any effect on pregnancy in cows (Hays et al, 1958).…”

Section: Effects Of Gnrhmentioning

confidence: 99%

“…Oxytocin was used to increase conception rate (CR) by improving the sperm transport in the female reproductive tract of several species (Hays et al, 1958;Hawk 1987;Sayre and Lewis 1997;King et al, 2004;Yildiz, 2005). Clitoral massage which probably releases oxytocin following artificial insemination increased pregnancy in beef cows but not in beef heifers or dairy cows (Randel et al, 1975;Cooper et al, 1984).…”

Section: Effects Of Gnrhmentioning

confidence: 99%

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Effects of GnRH, PGF<sub>2α</sub> and oxytocin treatments on conception rate at the time of artificial insemination in lactating dairy cows

Gümen¹,

Keskin²,

Yılmazbaş-Meci̇toğlu³

et al. 2011

CZECH J ANIM SCI

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AbstRAct:In several studies, hormones such as gonadotropin-releasing hormone (GnRH), prostaglandins and oxytocin were used to increase pregnancy rate by inducing ovulation and improving the sperm transport in the female reproductive tract in lactating dairy cattle. The objective of this study was to compare the effects of GnRH, prostaglandin F 2α (PGF 2α ) and oxytocin treatments at the time of artificial insemination (AI) after spontaneous oestrus on the conception rate (CR) of lactating dairy cows. Oestrus was detected by visual observations by experienced personnel. All cows (n = 430, 308 Holstein-Frisian and 122 SwedishRed dairy cows) were inseminated based on the am/pm rule by veterinarians of the farm. After AI, cows were alternately assigned to one of the four treatment groups: (1) GnRH (n = 113); (2) PGF 2α (n = 106); (3) oxytocin (n = 106) and (4) non-treated control (n = 105). Pregnancy diagnosis was performed 28-34 and 58-64 days post-insemination by transrectal ultrasonography. Conception rates on days 28-34 and 58-64 were not different among GnRH (46.0%; 52/113 and 44.3%; 50/113), PGF 2α (37.7%; 40/106 and 35.9%; 38/106) and control (49.5%; 52/105 and 47.6%; 50/105) groups. However, conception rates were lower (P = 0.02) in oxytocin (31.1%; 33/106 and 30.2%; 32/106) than in GnRH and control groups on days 28-34 and 58-64. Other covariant factors, such as milk production, days in milk (DIM), breed, parity, service number did not affect the conception rate. Thus, there were no beneficial effects of treatments with GnRH and PGF 2α at the time of AI, and oxytocin had an adverse effect on CR in lactating dairy cows in this study.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Effects Of Gnrhmentioning

confidence: 99%

Section: Effects Of Gnrhmentioning

confidence: 99%

See 2 more Smart Citations

Effects of GnRH, PGF<sub>2α</sub> and oxytocin treatments on conception rate at the time of artificial insemination in lactating dairy cows

Gümen¹,

Keskin²,

Yılmazbaş-Meci̇toğlu³

et al. 2011

CZECH J ANIM SCI

View full text Add to dashboard Cite

show abstract

“…Clitoral massage which probably releases oxytocin following artificial insemination increased pregnancy in beef cows [10]. The administration of oxytocin following AI also increased CR in lactating dairy cows [9] but in another study it had hardly any effect on pregnancy in cows [11]. The objective of the present study was to study the effect of different hormonal treatments used to improve the reproductive efficiency in ewes on different reproductive parameters and antioxidant profiles after natural mating in subtropics.…”

Section: Introductionmentioning

confidence: 98%

Improvement of Conception in Sheep Using Different Hormonal Treatments during Mating and their Influence on the Antioxidant Status

Hamdoun¹

2014

J Metabolic Synd

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The objective of this study was to compare the effects of GnRH, prostaglandin F2α (PGF2α) and oxytocin treatments at the time of natural mating on the conception rate (CR) of non lactating pluriparous ewes. All ewes (n=61) were served naturally by fertile rams every 12 hours after the beginning of estrus. After natural mating, ewes were randomly assigned into four treatment groups; G1 received PGF2α (n=14); G2 received GnRH (n=12); G3received oxytocin (n=15) and G4 or control received placebo (n=20). Pregnancy diagnosis was performed 25 days post-insemination by transrectal ultrasonography. Ewes were bled at the day of mating and every 10 days till Day 50 post mating to determine the changes in the total antioxidants during the first third of pregnancy. Pregnancy rate was higher (P<0.05) for all the treatment groups (69.33%) compared with the control group (55.54%). Litter size did not differ between groups except for oxytocin group. Ewe lambs dominate male in this study and the sex ratio unexpectedly preferred them. Total antioxidants did not differ significantly between groups in the present study but they were at their lowest values during estrus in all the studied groups. Gestation length, birth weight, number of services, body weight did not affect the pregnancy rate. It could be concluded that treatments with GnRH and PGF and oxytocin at the time of service could improve conception rate in pluriparous ewes.

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Oestrus Detection in Cattle: A Factor in “Management Infertility”

Fallon

1962

British Veterinary Journal

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Effect of Oxytocin and Epinephrine on the Conception Rate of Cows

Cited by 7 publications

References 5 publications

Effects of GnRH, PGF<sub>2α</sub> and oxytocin treatments on conception rate at the time of artificial insemination in lactating dairy cows

Effects of GnRH, PGF<sub>2α</sub> and oxytocin treatments on conception rate at the time of artificial insemination in lactating dairy cows

Improvement of Conception in Sheep Using Different Hormonal Treatments during Mating and their Influence on the Antioxidant Status

Oestrus Detection in Cattle: A Factor in “Management Infertility”

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