Πλοήγηση ανά Θέμα "FOLLICLE-STIMULATING-HORMONE"
Αποτελέσματα 1-20 από 21
-
Changes in pituitary sensitivity to GnRH in estrogen-treated post-menopausal women: evidence that gonadotrophin surge attenuating factor plays a physiological role
(2004)BACKGROUND: The purpose of this study was to investigate changes in pituitary response to GnRH in post-menopausal women during substitution treatment with exogenous estrogen and progesterone. METHODS: Seven healthy ... -
Clomiphene in the 21st century
(1998) -
Current and future status of ovulation induction in polycystic ovary syndrome
(1997)Great progress has been achieved during the last 20 years in the field of ovulation induction in patients with polycystic ovary syndrome (PCOS). Clomiphene citrate remains the first line of treatment for all anovulatory ... -
Development and application of competitive ELISA assays for rat LH and FSH
(1999)Rat LH (rLH) and FSH (rFSH) were measured by sensitive and specific competition ELISAs. The rat LH ELISA used rLH-I-9 coated plates, an antiserum against rLH and an antibody against rabbit IgG labeled with peroxidase. Using ... -
Effect of Anti-Mullerian hormone (AMH) and bone morphogenetic protein 15 (BMP-15) on steroidogenesis in primary-cultured human luteinizing granulosa cells through Smad5 signalling
(2015)To determine if there is any effect of AMH and BMP-15 on estradiol and progesterone production from primary-cultured human luteinizing granulosa cells, to delineate what is the effect of FSH on their actions and which are ... -
Effect of porcine and ovine FSH on nuclear maturation of pig oocytes in vitro
(2008)The effect of porcine or ovine FSH on the maturation rate of porcine oocytes and on the time course of meiotic progression was studied. Groups of 20 grade-A cumulus oocyte complexes, aspirated from slaughterhouse cycling-gilt ... -
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 ... -
Failure of the GnRH antagonist ganirelix to block the positive feedback effect of exogenous estrogen in normal women
(2010)This study investigated whether the GnRH antagonist ganirelix is able to block the positive-feedback effect of E-2 in normal women. Ganirelix was unable to block the positive-feedback effect, suggesting that the clinical ... -
FSH modulatory effect on human granulosa cells: a gene-protein candidate for gonadotrophin surge-attenuating factor
(2011)Previous evidence indicates a homology of gonadotrophin surge-attenuating factor (GnSAF) to the carboxyl terminal of human serum albumin (HSA) and the ability of human granulosa cells to produce mRNA transcripts corresponding ... -
In a flexible antagonist protocol, earlier, criteria-based initiation of GnRH antagonist is associated with increased pregnancy rates in IVF
(2005)BACKGROUND: The purpose of the study was to assess ongoing pregnancy rates across groups of patients treated by IVF, which were defined according to criteria aimed at the prevention of premature LH surge and used for ... -
Inhibin secretion in women with the polycystic ovary syndrome before and after treatment with progesterone
(2011)Objectives: It has been suggested that inhibin secretion is altered in women with the polycystic ovary syndrome (PCOS). However, the contribution of a preceding luteal phase has not been taken into account. The aim of the ... -
Leptin in human reproduction
(1999)The recent discovery of the obese (ob) gene has provided new insight into the mechanism which controls body fat mass. Leptin, a product of the ob gene, serves as the link between fat and the brain. This protein, by acting ... -
Modulatory effect of the ovary on LH secretion
(2003)Ovarian steroids are important regulators of gonadotropin secretion during the normal menstrual cycle. Estradiol is the predominant factor in the follicular phase, while progesterone plays an important role in the luteal ... -
Novel aspects of the endocrinology of the menstrual cycle
(2014)Ovarian control of gonadotrophin secretion is normally achieved via the feedback mechanisms mediated by oestradiol and progesterone. Evidence has been provided that nonsteroidal substances, such as inhibin A and B, participate ... -
Ovarian control of pituitary sensitivity of luteinizing hormone secretion to gonadotropin-releasing hormone in women with the polycystic ovary syndrome
(2009)This study investigated the ovarian control of LH responsiveness to GnRH in anovulatory women with the polycystic ovary syndrome (PCOS). It is suggested that the enhanced pituitary sensitivity of LH secretion to GnRH in ... -
Ovarian feedback, mechanism of action and possible clinical implications
(2006)The secretion of gonadotrophins from the pituitary in women is under ovarian control via negative and positive feedback mechanisms. Steroidal and non-steroidal substances mediate the ovarian effects on the hypothalamic-pituitary ... -
Ovarian regulators of gonadotropin secretion
(2000)Great progress in the ovarian mechanisms that control gonadotrophin secretion in women has recently been achieved, Estradiol (E-2) is the main component of the ovarian negative effect on basal gonadotropin secretion during ... -
Ovulation induction: a mini review
(2005)Ovulation induction is the method for treating anovulatory infertility. For patients with hypogonadotrophic hypogonadism,the treatment involves administration of both FSH and LH, while HCG is injected for follicle rupture. ... -
Polycystic ovaries and obesity
(2015)Almost 50% of the women with polycystic ovary syndrome (PCOS) are obese. Obesity in PCOS affects reproduction via various mechanisms. Hyperandrogenism, increased luteinizing hormone (LH) and insulin resistance play a pivotal ...