{"title":"Resumption of postpartum ovarian cyclicity in winter-lambing Lohi sheep (Ovis aries)","authors":"S. Muhammad, R. Kausar, M. Hussain","doi":"10.47253/jtrss.v9i1.704","DOIUrl":null,"url":null,"abstract":"The postpartum ovarian cyclicity which is associated with uterine involution has significant importance in fertility of sheep. The study was conducted to estimate the postpartum resumption of ovarian cyclicity in Lohi sheep during winter lambing season. Twelve pregnant ewes were selected. The commencement of ovarian cyclicity was investigated in postpartum ewes by estimating progesterone (P4) concentration in blood samples collected on weekly intervals starting from day of parturition till 12th week of postpartum. On the day of parturition, mean P4 concentration was 0.38 ± 0.08 ng / mL. After that, P4 level raised to 0.70 ± 0.13 and 0.83 ± 0.13 ng / mL during 1st and 2nd weeks respectively. During 3rd week, P4 concentration was 1.02 ± 0.18 ng / mL (ovulation). The peak P4 level during first estrous cycle was 3.02 ± 0.8 ng / mL and detected on 5th week. Second ovulation was observed during 6th week and again peak P4 concentration of 2nd cycle was found as 2.5 ± 0.64 ng / mL on 7th week. Based upon the hormonal profile, it was concluded that postpartum ovarian cyclicity resumed on 3rd week of postpartum in winter lambed Lohi sheep.","PeriodicalId":17457,"journal":{"name":"Journal of Tropical Resources and Sustainable Science (JTRSS)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Tropical Resources and Sustainable Science (JTRSS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.47253/jtrss.v9i1.704","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The postpartum ovarian cyclicity which is associated with uterine involution has significant importance in fertility of sheep. The study was conducted to estimate the postpartum resumption of ovarian cyclicity in Lohi sheep during winter lambing season. Twelve pregnant ewes were selected. The commencement of ovarian cyclicity was investigated in postpartum ewes by estimating progesterone (P4) concentration in blood samples collected on weekly intervals starting from day of parturition till 12th week of postpartum. On the day of parturition, mean P4 concentration was 0.38 ± 0.08 ng / mL. After that, P4 level raised to 0.70 ± 0.13 and 0.83 ± 0.13 ng / mL during 1st and 2nd weeks respectively. During 3rd week, P4 concentration was 1.02 ± 0.18 ng / mL (ovulation). The peak P4 level during first estrous cycle was 3.02 ± 0.8 ng / mL and detected on 5th week. Second ovulation was observed during 6th week and again peak P4 concentration of 2nd cycle was found as 2.5 ± 0.64 ng / mL on 7th week. Based upon the hormonal profile, it was concluded that postpartum ovarian cyclicity resumed on 3rd week of postpartum in winter lambed Lohi sheep.
产后卵巢周期与子宫复旧有关,对绵羊的生育具有重要意义。本研究旨在探讨洛喜羊在冬产期产后卵巢周期的恢复情况。选取了12只怀孕母羊。通过测定产后母羊从分娩当天至产后第12周每周采集的血液样本中黄体酮(P4)浓度,研究了产后母羊卵巢周期的开始。分娩当天P4平均浓度为0.38±0.08 ng / mL,分娩后第1周和第2周P4浓度分别升高至0.70±0.13和0.83±0.13 ng / mL。第3周P4浓度为1.02±0.18 ng / mL(排卵)。第1发情周期P4峰值为3.02±0.8 ng / mL,于第5周检测到。第6周出现第二次排卵,第7周P4浓度再次达到峰值2.5±0.64 ng / mL。综合激素指标,得出冬羔Lohi羊产后第3周恢复产后卵巢周期的结论。