Mechanism controlling ovulation rate in ewes in relation to seasonal anoestrus
نویسندگان
چکیده
منابع مشابه
Effects of seasonal changes on the ovulation rate and embryo quality in superovulated Black Suffolk ewes.
OBJECTIVE The objective of this study was to investigate the effects of seasonal changes on the superovulation in Black Suffolk ewes, particularly the ovulation rate and embryo quality. DESIGN Black Suffolk ewes were superovulated either in May (n=22) or in September (n=21), 2013. After estrus synchronization with CIDR, the donor ewes were superovulated with PMSG and seven decreasing doses of...
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The ovaries of 3 groups of Merino ewes were examined for corpora lutea by laparoscopy every 17 days between 28.3.74 and 16.6.75. During the 1974 breeding season the mean body weight of the ewes was maintained at 37 kg. Between the 1974 and -1975 breeding seasons the nutrition of the ewes was varied to give groups of ewes with mean body weights of 37, 41 and 46 kg; groups of ewes of low, medium ...
متن کاملControl of gonadotrophin release in Scottish Blackface and Finnish Landrace ewes during seasonal anoestrus.
The patterns of LH and FSH secretion were measured in 4 experimental groups of Finnish Landrace and Scottish Blackface ewes: long-term (18 months) ovariectomized ewes (Group 1), long-term ovariectomized ewes with an oestradiol implant, which has been shown to produce peripheral levels of approximately 5 pg/ml (Group 2), long-term ovariectomized ewes with an oestradiol implant for 18 months whic...
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...
متن کاملefl teachers job satisfaction and social capital in relation to students’ motivation
abstract this mixed method study examines whether there is any relationship among the variables of the study (job satisfaction, social capital and motivation). the researcher considered job satisfaction and social capital as independent variables; motivation is the dependent variable of the study. the researcher applied a questionnaire to assess each variable. to measure efl teachers’ job sati...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1992
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0940143