Oxidative stress and its effects on reproductive performance in thermally-stressed ewes

FE, Sa’ayinzat; EK, Bawa; Ogwu, D.; JO, Ayo

doi:10.22271/veterinary.2021.v6.i4a.361

Cited by 5 publications

(2 citation statements)

References 64 publications

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“…It is also similar to the findings of Abu El-Ella et al (2016) in four groups (n=15 each) of Rahami ewes given different synchronization protocols of hormonal treatment with CIDR + PMSG, MAP + PMSG, gonadotrophic releasing hormone-prostaglandin F2 α (GnRH+GnRH+PGF2α) protocol and gonadotrophic releasing hormone (GnRH-PGF 2α -GnRH) protocol, respectively. Hesperidin is an antioxidant obtained mostly from citrus fruits and has biological and therapeutic properties such as scavenging free radical species (Sa'Ayinzat et al, 2021). Contrary to the findings of this current study, Gore (2017) found no effect of β-carotene on OD in Saanen goats.…”

Section: Discussioncontrasting

confidence: 99%

“…Thermal stress is known to cause oxidative stress through the generation of free radical species or reactive oxygen species (ROS) resulting in oxidant/antioxidant imbalance, thereby resulting in poor reproductive performance in ewes (Celi & Gabai, 2015;Sa'ayinzat et al, 2021). It impacts negatively on male and female reproductive capacities, resulting to overall poor reproductive performance (Boudjellaba et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Effects of hesperidin on the oestrous cycle of Yankasa ewes

2023

JoSVAS

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The study was conducted to investigate the effect of hesperidin on the oestrous cycle of Yankasa ewes. Twenty-six Yankasa ewes (26 ewes) aged 8 – 18 months were randomly assigned into treatment (n = 16) and control (n = 10) groups. The treatment group was given hesperidin at a dose rate of 200 mg/kg BW, once weekly for 4 weeks, while the control group received - 10 mL of a mix of DMSO and normal saline. The signs of oestrus were observed twice daily between 6.00 – 11.00 a.m. and 2.00 – 6.00 p.m. The time of onset of oestrus (TOO), oestrus response rate (ORR), and oestrus duration (OD) were determined for 3 oestrous cycles. The result showed that the TOO of the hesperidin-fed group was significantly (p ≤ 0.05) lower than those of the control group in the 2nd and 3rd oestrous cycles. ORR and OD were significantly (p ≤ 0.05) higher in the hesperidin-fed group compared to the control in the 2nd and 3rd oestrous cycles. The study indicates that hesperidin administration improved the TOO, ORR and OD in Yankasa ewes.

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Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of hesperidin on the oestrous cycle of Yankasa ewes

2023

JoSVAS

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Maternal exposure to bioclimatic stress and hypertensive disorders of pregnancy in Western Australia: identifying potential critical windows of susceptibility

Gebremedhin,

Nyadanu,

Hanigan

et al. 2024

Environ Sci Pollut Res

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The anthropogenic climate change may impact pregnancy outcomes. Rather than ambient temperature, we aimed to use a composite bioclimatic metric (Universal Thermal Climate Index, UTCI) to identify critical susceptible windows for the associations between bioclimatic exposure and hypertensive disorders of pregnancy (HDPs) risk. Daily UTCI exposure from 12 weeks of preconception through pregnancy was linked to 415,091 singleton pregnancies between 1st January 2000 and 31st December 2015 in Western Australia. Adjusted weekly-specific and cumulative odds ratios (ORs) and 95% confidence intervals (CIs) of gestational hypertension and preeclampsia were estimated with distributed lag non-linear and standard non-linear logistic regressions. Exposures from early pregnancy to week 30 were associated with greater odds of HDPs with critical susceptible windows, particularly elevated at the 1st (10.2 °C) and 99th (26.0 °C) exposure centiles as compared to the median (14.2 °C). The most elevated ORs were 1.07 (95% CI 1.06, 1.08) in weeks 8–18 for gestational hypertension and 1.10 (95% CI 1.08, 1.11) in weeks 11–16 for preeclampsia for the 99th exposure centile. Cumulative exposures associated with HDPs with relatively higher but less precise ORs. The effects of high exposure to HDPs indicated sociodemographic inequalities. The identified critical periods and subpopulations could benefit from climate-related interventions.

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