Melatonin treatment in spring and reproductive recovery in sheep with different body condition score and age

Luridiana, Sebastiano; Mura, Maria Consuelo; Daga, Cinzia; Farci, F; Stefano, Maria Veronica Di; Zidda, F.; Carcangiu, Vincenzo

doi:10.1016/j.anireprosci.2015.07.004

Cited by 23 publications

(14 citation statements)

References 30 publications

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“…The litter size (the number of lambs born per lambing ewe) of primiparous ewes has been found to be lower than that of multiparous lambing ewes. The result is in agreement with the finding of Dwyer et al (2005) and Luridiana et al (2015). The number of lambs born to a mating ewe throughout her life and the number of lambs born to a ewe at a given birth were affected by BCS and parity.…”

Section: Discussionsupporting

confidence: 91%

Body condition status at mating affects gestation length, offspring yield and return rate in ewes

2018

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Abstract. The present study was planned to determine the effect of ewe body condition score (BCS) and parities on fertility, return rate, gestation length, fecundity, litter size and lamb birth weight. Data were collected from 284 heads of ewes with first to fifth parity and raised at a state farm for three consecutive (2002)(2003)(2004) years. Teaser rams were used to monitor estrus twice daily in the morning and in the evening from September to October. BCSs and body weights (BWs) were recorded at mating and postpartum. The ewes, at mating time in breeding season and within first 6 h after the expulsion of fetal membranes, were divided into four groups on the basis of their BCS: thin (BCS = ≤ 2.0; n = 70; 38), medium (BCS = 2.5-3.0; n = 122; 142), fat (BCS = 3.5-4.0; n = 72; 59) and very fat (BCS = ≥ 4.5; n = 20;17). BCSs and BWs of ewes at postpartum were highly correlated with lamb birth weight (R = 0.486, P < 0.01, and R = 0.130, P < 0.05, respectively). BCSs and BWs of ewes at postpartum had positive effects on lamb birth weight (Y = 3.43 ± 0.10 + 0.130 + 0.047 ewe body condition score (EBCS), P < 0.01; Y = 2.92 ± 0.42 + 0.018 ± 0.009 ewe body weight (EBW), P < 0.05 kg of lamb birth weight per BCS and kilogram of ewe live weight, respectively). The fertility rate, litter size and fecundity were higher in the medium and fat groups than thin and very fat groups (χ 2 = 10.607, P < 0.01). The BW and BCS at postpartum affected gestation length positively (P < 0.05). Return rate or number of coitus for conception were higher (P < 0.05) in thin and very fat groups than medium and fat groups. The data revealed that the ewes with medium and fat body condition (BCS = 2.5-4.0) scores were profitable.

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Section: Discussionsupporting

confidence: 91%

Body condition status at mating affects gestation length, offspring yield and return rate in ewes

2018

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“…Numerous studies have proved that melatonin promotes the development of oocytes and embryos in sheep [25], pigs [26], cattle [27], mice [28] and humans [29] in the in vitro environment by scavenging ROS or. Luridiana et al reported that the melatonin implantation in ewe at the age of 5-6 with 3.5-4.0 body condition score (BSC) in spring improved fertility of ewes [30]. In our study, the pregnant rate of ewes received single melatonin injection was significantly increased as well as both pronuclear embryos and blastocysts compared with the control group.…”

Section: Discussionsupporting

confidence: 48%

Peer Review #3 of "Melatonin improves the efficiency of super-ovulation and timed artificial insemination in sheep (v0.2)"

Deng¹

2019

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It has been well proved that melatonin participates in the regulation of the seasonal reproduction of ewes. However, the effects of short term treatment of melatonin on ewe's ovulation are still to be clarified. In this study, the effects of melatonin on the number of embryos harvested from superovulation, and the pregnant rate in recipients after embryo transferred have been investigated. Hu sheep with synchronous estrus treatment were given melatonin subcutaneously injection (0, 5, and 10 mg/ewe, respectively). It was found that the estrogen level in the group of 5 mg melatonin was significantly higher than that of other two groups at the time of sperm insemination (p < 0.05). The pregnant rate and number of lambs in the group of 5 mg melatonin treatment was also significantly higher than that of the rests of the groups (P < 0.05). In another study, 31 Suffolk ewes as donors and 103 small-tailed han sheep ewes as recipients were used to produce pronuclear embryo and embryo transfer. Melatonin (5 mg) was given to the donors during estrus. The results showed that, the number of pronuclear embryos and the pregnancy rate were also significantly higher in melatonin group than that in the control group. In addition, 28 donors and 44 recipient ewes were used to produce morula/blastocyst and embryo transferring. Melatonin (5 mg) was given during estrus. The total number of embryos harvested (7.40±1.25/ewe vs. 3.96±0.73/ewe, P<0.05) and the pregnant rate (72.3±4.6% vs.54.7±4.0%, P<0.05) and number of lambs were also increased in melatonin group compared to the control group. Collectively, the results have suggested that melatonin treatment 36 hours after CIDR withdrawal could promote the number and quality of embryos in the in vivo condition and increased the pregnant rate and number of lambs.

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“…Luridiana et al (2015) reported that the melatonin implantation in ewe at the age of 5-6 with 3.5–4.0 body condition score (BSC) in spring improved fertility of ewes. In our study, the pregnant rate of ewes received single melatonin injection was significantly increased as well as both pronuclear embryos and blastocysts compared with the control group.…”

Section: Discussionmentioning

confidence: 99%

Melatonin improves the efficiency of super-ovulation and timed artificial insemination in sheep

Song

Wang

et al. 2019

PeerJ

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It has been well proved that melatonin participates in the regulation of the seasonal reproduction of ewes. However, the effects of short term treatment of melatonin on ewe’s ovulation are still to be clarified. In this study, the effects of melatonin on the number of embryos harvested from superovulation, and the pregnant rate in recipients after embryo transferred have been investigated. Hu sheep with synchronous estrus treatment were given melatonin subcutaneously injection (0, 5, and 10 mg/ewe, respectively). It was found that the estrogen level in the group of 5 mg melatonin was significantly higher than that of other two groups at the time of sperm insemination (p < 0.05). The pregnant rate and number of lambs in the group of 5 mg melatonin treatment was also significantly higher than that of the rests of the groups (P < 0.05). In another study, 31 Suffolk ewes as donors and 103 small-tailed han sheep ewes as recipients were used to produce pronuclear embryo and embryo transfer. Melatonin (5 mg) was given to the donors during estrus. The results showed that, the number of pronuclear embryos and the pregnancy rate were also significantly higher in melatonin group than that in the control group. In addition, 28 donors and 44 recipient ewes were used to produce morula/blastocyst and embryo transferring. Melatonin (5 mg) was given during estrus. The total number of embryos harvested (7.40 ± 1.25/ewe vs. 3.96 ± 0.73/ewe, P < 0.05) and the pregnant rate (72.3 ± 4.6% vs. 54.7 ± 4.0%, P < 0.05) and number of lambs were also increased in melatonin group compared to the control group. Collectively, the results have suggested that melatonin treatment 36 hours after CIDR withdrawal could promote the number and quality of embryos in vivo condition and increased the pregnant rate and number of lambs.

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Melatonin treatment in spring and reproductive recovery in sheep with different body condition score and age

Cited by 23 publications

References 30 publications

Body condition status at mating affects gestation length, offspring yield and return rate in ewes

Body condition status at mating affects gestation length, offspring yield and return rate in ewes

Peer Review #3 of "Melatonin improves the efficiency of super-ovulation and timed artificial insemination in sheep (v0.2)"

Melatonin improves the efficiency of super-ovulation and timed artificial insemination in sheep

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