Ram-induced oestrus and ovulation in lactating and weaned Corriedale ewes
نویسندگان
چکیده
منابع مشابه
The onset of oestrus and ovulation in lactating rats.
Lactation delays the re-initiation of oestrous cyclicity in rats, resulting in physiological sterility for the duration of suckling. During this phase, the secretion of pituitary gonadotrophins is suppressed by an unknown mechanism. Continued application of the suckling stimulus by litter replacement (Bruce, 1958; Nicoll & Meites, 1959), or injections of prolactin (Meites & Nicoll, 1959), have ...
متن کاملEffects of lactation, suckling and oxytocin on post-partum ovulation and oestrus in ewes.
The first ovulation and first oestrus after parturition were recorded in four groups of Merino ewes which: (a) reared their lambs normally, (b) were allowed to suckle their lambs only during three 1-hr periods each day, (c) had their lambs removed on the day after birth, or (d) had their lambs removed on the day after birth and were injected intramuscularly with 5 i.u. oxytocin ten times each d...
متن کاملeffect of bataine and sulphate supplement on wool and milk characteristics and lambs performance in naine ewes
تعداد 20 رأس میش نژاد نائینی 6+-24 ماهه، با میانگین وزن 2/3-+40 کیلوگرم، همراه با 20 رأس بره های آنها در قالب طرح کاملا تصادفی اثر بتائین و مکمل سولفات بر خصوصیات شیر و پشم و عملکرد بره ها بررسی شد. میش ها بطور تصادفی در چهار تیمار قرار گرفتند. تیمارها عبارت بودند از: 1-گروه شاهد 2-بتائین (05/0 درصد ماده خشک) 3-سولفات (24/0 سولفور درصد ماده خشک 4-بتائین هرماه با سولفات. جیره غذائی طبق nrc با مح...
15 صفحه اولControl of Oestrus and Ovulation in Cows
Although the methods and techniques that will be used to synchronize follicle growth and ovulation in the future may yet to be discovered, many tools that are needed may already exist. Once synchronous growth of a competent dominant follicle occurs, ovulation can be induced at a predictable time by applying drugs or hormones that induce LH release, or by administration of exogenous LH. Developm...
متن کاملEffect of Winter Nutrition and Lactation on Ovulation and Ovulation Rate in Ewes in Autumn
The effect of undernutrition during July-September on oestrus and ovulation rate in Janury-April was investigated in lactating and dry Corriedale ewes. The low levels of nutrition imposed from July resulted in a 5 to 10 kg difference in liveweight in September but thereafter liveweights had equilibrated with control ewes by December. This undernutrition decreased the probability of ovulating ea...
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ژورنال
عنوان ژورنال: Animal
سال: 2010
ISSN: 1751-7311
DOI: 10.1017/s1751731109991303