LIFE-SPAN OF CORPORA LUTEA IN EWES WITH ONE CONGENITALLY ABSENT UTERINE HORN
نویسندگان
چکیده
منابع مشابه
Corpus luteum maintenance in a ewe with one congenitally absent uterine horn.
During the oestrous cycle of the sheep, normal regression of the corpus luteum (cl) on Day 15 is prevented by total hysterectomy and the cycle is extended to a length approximating the gestation period (Wiltbank & Casida, 1956; Moor & Rowson, 1964). Rowson & Moor (1964) also reported that the increased life-span of the cl in partially hysterectomized sheep was roughly proportional to the amount...
متن کاملEffect of continuous intrauterine administration of prostaglandin E2 on life span of corpora lutea of nonpregnant ewes.
The antiluteolytic effect of prostaglandin (PG) E2 was tested in two experiments. In experiment I, seven nonpregnant ewes that had ovulated bilaterally, were laparotomized on day-11 postestrus. Uterine horns were isolated by ligatures between the internal and external bifurcations and around blood vessels in the intercornual area. An Alzet TM minipump (25 • 6.5 ram) containing PGE2 (delivery ra...
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Two experiments were designed to examine whether hormonal profiles were related to luteal life span in pluriparous postpartum anestrous beef cows. Cows (Exp. 1, n = 34; Exp. 2, n = 23) received norgestomet (N) for 9 d or served as controls (C). Each cow received 1,000 IU human chorionic gonadotropin (hCG) 48 h after removal of N (d 0). Blood samples collected every 15 min for 8 h on d -5, 3 and...
متن کاملFormation and function of GnRH-induced subnormal corpora lutea in cyclic ewes.
Of 19 dioestrous ewes given 50 micrograms GnRH on Day 10 of the oestrous cycle, 15 (79%) formed corpora haemorrhagica within 2 days after injection of GnRH. After excision of the Day 10 spontaneous CL, the GnRH-induced CL were short lived when compared to spontaneous CL in saline-treated ewes (3.1 +/- 0.4 vs 17.3 +/- 0.3 days, respectively). Hysterectomy of ewes bearing the GnRH-induced CL prev...
متن کاملThe development of sheep embryos when two are transferred into only one uterine horn or into each uterine horn.
In two series of experiments, two D6 morulae were surgically transferred either to each uterine horn of recipient ewes or to the same horn. When embryos were transferred to each side, the percentages of lambs born were not significantly different (68 and 62.5% respectively) whether the corpora lutea of recipient ewes were on each ovary or on the same ovary (in this case, embryos were transferre...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1970
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0230131