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Goats in Group A were pretreated for 9 days with a synthetic progestagen, administered via intravaginal sponge, and 1000 i.u. PMSG s.c. on Day 12 of the oestrous cycle. Goats in Group B had the same PMSG treatment, but not the progestagen pretreatment. Group C goats received a s.c. twice daily injection of a porcine FSH preparation (8 mg on Day 12, 4 mg Day(More)
We studied the localization of alpha-keratin in the sheep placenta using an alpha-keratin-specific monoclonal antibody (MAb) SBU-1, and examined the feasibility of using this MAb as a marker for determining the purity of isolated uninucleate cells from the placentomal trophoblast. At about 30-50 days of gestation the placentomal and interplacentomal(More)
Human luteal phase function as evaluated by peripheral venous blood steroid levels does not appear to be impaired following the aspiration of follicular fluid together with a cumulus enclosed oocyte and a number of granulosal cells from the immediate preovular follicle in women having otherwise spontaneous ovular cycles. The day to day levels of luteinising(More)
Prostaglandins (PGs) are produced by a variety of uteroplacental tissues during pregnancy and are released into the fetal fluid sacs and both the uterine and umbilical circulations. Uterine PG output increases towards term and is enhanced by maternal undernutrition in pregnant ewes and mares. In both species, withdrawal of food but not water for 30-48 h(More)
1. The effects of nutrient availability on the plasma concentrations of prostaglandin E (PGE) were investigated in chronically catheterized ewes and their fetuses during late gestation by varying dietary intake and by experimental manipulation of the fetal plasma concentration of glucose. The aim of the study was to determine whether varying the glucose(More)
Infusion of the prostaglandin synthetase inhibitor 4-aminoantipyrine at a rate of 20 mg/min via the fetal tarsal vein during normothermic conditions (ambient temperatures = 24 degrees C) significantly decreased the concentrations of prostaglandins E2 and F2 alpha in maternal and fetal arterial plasma and in uterine and umbilical vein plasma. The infusion(More)
The effect of RU486, a synthetic progesterone receptor antagonist, on basal uterine prostaglandin (PG) release and release in response to oxytocin injection has been investigated in late-pregnant sheep (days 135-140 of gestation). Fifteen hours after i.m. injection of RU486 (50 mg; n = 5) or vehicle alone (n = 4), bolus injections of oxytocin (50, 500 and(More)
Castrated prepubertal lambs were hypophysectomized and then treated with GH and testosterone either alone or in combination over a series of 3-week treatment periods. Hypophysectomy resulted in a rapid reduction in skeletal growth rate which could be reversed by the administration of either GH (4 IU three times a week for 3 weeks) or testosterone propionate(More)