Short oestrous cycles in sheep during anoestrus involve defects in progesterone biosynthesis and luteal neovascularisation
نویسندگان
چکیده
منابع مشابه
Male-induced short oestrous and ovarian cycles in sheep and goats: a working hypothesis.
The existence of short ovulatory cycles (5-day duration) after the first male-induced ovulations in anovulatory ewes and goats, associated or not with the appearance of oestrous behaviour, is the origin of the two-peak abnormal distribution of parturitions after the "male effect". We propose here a working hypothesis to explain the presence of these short cycles. The male-effect is efficient du...
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A continuous supply of lambs is expected from the market, but not realizable without additional administration of hormones in seasonal breeds kept under extensive conditions. Our study had the aim to work out a possibility to induce fertile cycles in a flock of the Blackhead sheep already in early summer. Analyses of hormones progesterone and LH in untreated ewes were used, together with other ...
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Background: To compare the effect of GnRH agonist administration with vaginal progesterone on serum progesterone in Luteal phase in control ovarian hyper stimulation and intrauterine insemination cycles Materials and Methods: In this clinical trial, 242 infertile patients because of UEI (unexplained inferetility candidate for ovarian stimulation and intrauterine insemination reffering to infert...
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in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
Luteal Plasma Progesterone In
p LASMA concentrations of progesterone in the ewe reach a plateau by about the 10th day of the estrous cycle, though there is considerable variation between days and animals (Stabenfeldt, Holt and Ewing, 1969; Thorburn, Bassett and Smith, 1969). Thorburn et al. (1969) observed variation in the luteal phase peak values of progesterone in the same ewes in successive cycles, which they speculated ...
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ژورنال
عنوان ژورنال: REPRODUCTION
سال: 2014
ISSN: 1470-1626,1741-7899
DOI: 10.1530/rep-13-0400