Zobrazeno 1 - 10
of 25
pro vyhledávání: '"W J Silvia"'
Publikováno v:
Reproduction. 112:337-346
The reproductive tracts of nine thoroughbred mares were examined by ultrasound to determine the day of ovulation (day 0). Mares were fitted with intercavernous sinus cannulae on the day before the start of sample collection of pituitary venous efflue
Publikováno v:
Journal of Animal Science. 72:2718-2721
Twenty-three ewes were used in an experiment to determine the point in metabolism at which prostaglandin (PG) F2 alpha loses its luteolytic activity. Ewes exhibited at least one normal estrous cycle (15 to 19 d) and then were randomly assigned to one
Publikováno v:
Journal of Animal Science. 72:459-463
This experiment was designed to examine the effects of progesterone on endogenous and oxytocin-induced secretion of prostaglandin F2 alpha (PGF2 alpha) in sows. Peripheral concentrations of 13,14-dihydro-15-keto-PGF2 alpha (PGFM) were used as an indi
Autor:
W. J. Silvia, R. E. Raw
Publikováno v:
Reproduction. 98:341-347
Two experiments were conducted to determine how progesterone and oestradiol regulate pulsatile secretion of PGF2 alpha from the ovine uterus. In Expt 1, ovariectomized ewes received: (1) no treatment, (2) oestradiol, (3) progesterone, or (4) oestradi
Autor:
W. J. Silvia, R E Raw
Publikováno v:
Reproduction. 97:529-537
Oxytocin appears to play an important role in regulating uterine secretion of prostaglandin F2 alpha (PGF2 alpha) in sheep. Changes in uterine secretion of PGF2 alpha throughout the oestrous cycle and early pregnancy may be due to changes in the intr
Publikováno v:
Biology of reproduction. 69(1)
Two experiments were conducted to examine circulating concentrations of progesterone (P4) in cows with ovarian follicular cysts (OFCs) and to relate differing levels of P4 to subsequent follicular events. In experiment 1, peripheral concentrations of
Publikováno v:
Biology of reproduction. 67(1)
The effect of progesterone on oxytocin-induced secretion of prostaglandin (PG) F(2alpha) from bovine endometrial tissue explants was examined. Endometrial tissue from the late luteal phase were preincubated for 20 h in control medium. Explants were t
Publikováno v:
Biology of reproduction. 65(4)
Oxytocin stimulates a rapid increase in ovine endometrial prostaglandin (PG) F2alpha synthesis. The overall objective of these experiments was to investigate the cellular mechanisms by which oxytocin induces endometrial PGF2alpha synthesis. The objec
Publikováno v:
Biology of reproduction. 62(2)
Thirty ovariectomized sows were used in an experiment designed to determine whether the ability of the porcine uterus to release prostaglandin (PG) F(2alpha) in response to oxytocin is regulated by progesterone (P(4)) and estradiol (E(2)). Sows were
Publikováno v:
Reproduction, fertility, and development. 9(2)
Two experiments were conducted to determine if withdrawal of progesterone during the luteal phase of the oestrous cycle affected the ability of the ovine uterus to secrete prostaglandin F2α(PGF2α ) in response to oxytocin. In Experiment 1, 18 ewes