Listar por tema "LH"
Mostrando ítems 1-11 de 11
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Alternate day and daily administration of GnRH antagonist may prevent premature luteinization to a similar extent during FSH treatment
(2005)BACKGROUND: This randomized controlled trial was designed to evaluate whether a GnRH antagonist given every other day could prevent premature luteinization in women undergoing IVF/ICSI treatment. METHODS: A total of 73 ... -
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 ... -
Effect of ghrelin on gonadotrophin secretion in women during the menstrual cycle
(2009)It has been suggested that ghrelin may affect reproduction in animals by decreasing pituitary LH secretion. The role of ghrelin on LH secretion in women has not been investigated. Our aim was to assess the effect of ghrelin ... -
The endocrine effects of multiple folliculogenesis
(2011)Induction of multiple follicular development is a common practice in IVF programmes. Nevertheless, such an approach is not without implications. Apart from the high multiple pregnancy rate, marked changes in the secretion ... -
From menarche to regular menstruation - Endocrinological background
(2006)Marked changes in hormone secretion occur from childhood to adulthood. Prior to puberty gonadotropin-releasing hormone (GnRH) secretion is markedly suppressed. At the onset of puberty, the hypothalamic gonadostat is ... -
Human ghrelin decreases pituitary response to GnRH in superovulated ewes
(2013)In addition to its metabolic role, ghrelin has been found to suppress luteinizing hormone secretion in many species acting mainly at the hypothalamic level. The objectives of the present study were to test the hypothesis ... -
Inhibitory Effect of Submaximal Doses of Ghrelin on Gonadotropin Secretion in Women
(2014)The effect of ghrelin on gonadotropin secretion has been equivocal. Recent data have shown an inhibitory effect of repeated injections of ghrelin on nocturnal LH and FSH secretion in women. The aim of this study was to ... -
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 ... -
The recombinant subdomain IIIB of human serum albumin displays activity of gonadotrophin surge-attenuating factor
(2004)BACKGROUND: Gonadotrophin surge-attenuating factor (GnSAF) is an as yet unidentified ovarian factor that acts on the pituitary to attenuate the pre-ovulatory LH surge. In a previous study, GnSAF bioactivity was proposed ... -
The role of gonadotropins in the follicular phase
(2010)Folliculogenesis in humans is a lengthy process that involves several regulators. Pituitary gonadotropins play crucial roles in the late stages, particularly in the last 15 days of follicle maturation. During the intercycle ...