Luteal Plasma Progesterone In
نویسنده
چکیده
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 was due to variation in number of CL. Season and nutrition influence annual reproductive rhythms and also affect the suppressive action of exogenous progesterone on estrus and ovulation (Lamond, 1963, 1964). The purpose of the present study was to relate luteal phase plasma progesterone concentration to number of CL in ewes maintained for an 8-month period on three nutritional regimes.
منابع مشابه
Effects of season on plasma progesterone profiles in repeat breeding cows
Forty six Holstein Friesian repeat breeding cows (the average AI/conception was 5.2 ± 0.2) were investigated using the progesterone assay after AI to determine possible differences in plasma progesterone profiles between summer and winter seasons. Twenty eight (60.9%) and 18 (39.1%) cows were followed in summer (June–August) and winter (December–February), respectively. In the summer season, th...
متن کاملEffects of aglépristone, a progesterone receptor antagonist, administered during the early luteal phase in non-pregnant bitches.
Aglépristone, a progesterone receptor antagonist, was administered to six non-pregnant bitches in the early luteal phase in order to determine its effects on the duration of the luteal phase, the interestrous interval, and plasma concentrations of progesterone and prolactin. Aglépristone was administered subcutaneously once daily on two consecutive days in a dose of 10 mg/kg body weight, beginn...
متن کاملGonadotropin and Sex Steroid Levels Across the Luteal Phase LH Plasma
A bstract. The pattern of episodic gonadotropin release was studied in 15 normal female volunteers during the luteal phase ofthe menstrual cycle with 24 h ofblood sampling for follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels at 10-min intervals. Six subjects (two in the early, two in the mid-, and two in the late luteal phase) also had each of these specimens processed for...
متن کاملInhibition of progesterone secretion by oestradiol administered in the luteal phase of assisted conception cycles.
A prospective randomised study was done to assess the effect of supplemental oestradiol in addition to progesterone on the luteal steroid profiles and pregnancy outcome in stimulated cycles with and without pituitary down regulation. Women undergoing stimulated cycle IVF with GnRH-a and FSH (Group A, n = 63) or stimulated intrauterine insemination using CC and FSH (Group B, n = 55) were studied...
متن کاملProgesterone production by cultured luteal cells in the presence of bovine low- and high-density lipoproteins purified by heparin affinity chromatography.
The objectives of this study were to separate plasma lipoprotein particles based on the presence (low-density lipoproteins; LDL) or absence of apolipoprotein B (high-density lipoproteins; HDL) and to compare the abilities of bovine LDL and HDL to stimulate progesterone production by bovine luteal cells in culture. Plasma lipoproteins were isolated by ultracentrifugation and separated into LDL a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007