Πλοήγηση ανά Θέμα "PROGESTERONE"
Αποτελέσματα 1-13 από 13
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Activin A and Follistatin as Biomarkers for Ectopic Pregnancy and Missed Abortion
(2013)Activin A as a predictor of pregnancy failure has been the focus of heated debate, but the value of a combined activin A and follistatin (FS) measurement in serum to predict pregnancy failure has not been reported yet. We ... -
Attenuation of the oestrogen positive feedback mechanism with the age in postmenopausal women
(2015)ObjectiveIt has been reported that the positive feedback mechanism of oestrogens and progesterone is preserved, although attenuated, in late postmenopausal years. Whether this is also true for the positive feedback effect ... -
Effect of mifepristone (RU486) on the pituitary response to gonadotrophin releasing hormone in women
(1996)Mifepristone interrupts folliculogenesis in women but the mechanism is not clear, Previous studies have investigated the effect of this compound on gonadotrophin secretion and have provided conflicting results. To study ... -
Endometrial carcinoma: association of steroid hormone receptor expression with low angiogenesis and bcl-2 expression
(2001)In endometrial tissues, malignant change may be accompanied by a loss of hormone dependence which is, usually, reflected in a parallel loss of oestrogen and progesterone receptors (ER and PR). In this study, the steroid ... -
Evidence for non genomic action of 17 beta estradiol on transepithelial resistance of human fetal membranes
(2011)Background: The role of hormones in the transport mechanisms of human fetal membranes in pregnancy is unclear. Estrogens are essential hormones in pregnancy and they play an important role in the ion transport via membranes. ... -
Evidence of differential control of FSH and LH responses to GnRH by ovarian steroids in the luteal phase of the cycle
(2002)BACKGROUND: It is known that during the follicular phase of the cycle, estradiol sensitizes the pituitary to GnRH. The aim of this study was to determine the role of ovarian steroids in the control of GnRH-induced gonadotrophin ... -
Evidence that termination of the estradiol-induced luteinizing hormone surge in women is regulated by ovarian factors
(2006)Background: The endogenous LH surge is the result of the estrogen-positive feedback effect. However, the factors that are responsible for the termination of LH surge are not known. Objective: The objective of the study was ... -
Follicle ablation improves the ovarian response and the number of collected embryos in superovulated cows during the early stages of lactation
(2006)A field study was designed to compare ovarian response and embryo yield in cows during early lactation when gonadotropin administration followed one of four treatments. In group 1A (n = 19) and 1B (n = 9), the estrouses ... -
Interleukin-15 (IL-15) and Anti-C1q Antibodies as Serum Biomarkers for Ectopic Pregnancy and Missed Abortion
(2013)Given the present lack of clinically useful tests for the accurate diagnosis of ectopic pregnancy (EP), there is a need to select out those immunological factors measured in the maternal serum, as potential biomarkers. Our ... -
Luteal stage dependence of pituitary response to gonadotrophin-releasing hormone in cyclic dairy ewes subjected to synchronisation of ovulation
(2005)Possible hormonal aberrations precluding conception or maintenance of pregnancy in dairy ewes subjected to ovulation synchronisation were investigated in this study. The pituitary response to exogenous gonadotrophin-releasing ... -
Modulating effect of leptin on basal and follicle stimulating hormone stimulated steroidogenesis in cultured human lutein granulosa cells
(2009)Background: In vitro data have shown conflicting results in terms of the effect of leptin on granulosa cells steroidogenesis. Aim: The aim of the present study was to investigate the effect of low and high doses of leptin ... -
Relationship between electrical resistance of cervical mucus and ovarian steroid concentration at the time of artificial insemination in ewes
(2014)The purpose of this study was to investigate whether fertile or non-fertile inseminations (AI) in synchronized ewes are correlated with the electrical resistance of cervical mucus (ERCM) and the ovarian steroid concentration. ... -
Supplementation of lactating ewes with a glucogenic preparation or beta-carotene in mid- to late lactation on subsequent milk yield and luteinizing hormone secretion
(2007)The effects of a glucogenic preparation (Nutrimix((R))) or beta-carotene (Rovimix((R)) beta carotene) supplementation of ewes during mid- to late-lactation on their milk yield were assessed in a study where 66 Chios-breed ...