Parcourir par sujet "progesterone"
Voici les éléments 21-33 de 33
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Normal menstrual cycle steroid hormones variation does not affect the blood levels of total adiponectin and its multimer forms
(2015)Objective Plasma total adiponectin reveals a sexual dimorphism indicating that gonadal steroids may be involved in its secretion and/or metabolism. However, results from previous reports are conflicting and data regarding ... -
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 ... -
Oestradiol plus progesterone treatment increases serum leptin concentrations in normal women
(2001)BACKGROUND: Previous studies have alluded to a role for both oestradiol and progesterone in the secretion of leptin from fat cells in the human, although direct evidence has yet to be obtained. The study aim was to assess ... -
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 ... -
Progesterone concentration as an indicator of ovarian response to superovulation in Chios ewes
(2002)We investigated the prediction of the ovarian response to superovulation using progesterone (P-4) determination in Chios ewes. During the estrus period, estrus synchronization and multiple ovulations were induced in 100 ... -
The progesterone positive feedback effect in women after ovariectomy
(2013)Various ovarian substances regulate the secretion of gonadotrophins during the menstrual cycle, but there are still several unclarified issues. The aim of this study was to investigate the positive feedback effect of ... -
Rapid effect of progesterone on transepithelial resistance of human fetal membranes: Evidence for non-genomic action
(2008)1. The factors that regulate human fetal membrane transport mechanisms are unknown. The aim of the present study was to investigate the effect of progesterone on transepithelial electrical resistance (R-TE) in the human ... -
Rapid effects of 17β-estradiol and progesterone on sheep visceral and parietal pleurae via a nitric oxide pathway
(2002)We investigated the effects of 17β-estradiol and progesterone on transepithelial electrical resistance (R TE) in sheep visceral and parietal pleurae. Specimens of intact pleurae from adult female sheep were used. The samples ... -
Regulation of aromatase expression by hormones, drugs pesticides and environmental pollutants in canine mammary CMT-U27 cells
(2010)Aromatase, the enzyme that coverts testosterone to 17β-estradiol, has attracted attention lately because of its involvement in some forms of breast cancer in women. Studies are now undergoing on a variety of species to ... -
Relation between leptin and cortisol values in umbilical vessels at normal vaginal delivery
(2004)To study the role of various hormones in the control of fetal leptin secretion during labour, 33 pregnant women with normal singleton term pregnancy were recruited. At the time of spontaneous vaginal delivery, a venous ... -
A study on ghrelin and LH secretion after short fasting and on ghrelin levels at perioestrual period in dairy cattle
(2019)In two experiments, we studied (a) the changes of LH secretion in heifers under different feeding schedules and (b) total ghrelin concentration at oestrus in cows and heifers. In experiment one, synchronized heifers were ... -
Transdermal testosterone pretreatment in poor responders undergoing ICSI: A randomized clinical trial
(2016)STUDY QUESTION: Does pretreatment with transdermal testosterone increase the number of cumulus-oocyte complexes (COCs) retrieved by more than 1.5 in poor responders undergoing intracytoplasmic sperm injection (ICSI), using ... -
Treatment of normal women with oestradiol plus progesterone prevents the decrease of leptin concentrations induced by ovariectomy
(2000)To study the role of oestradiol and progesterone in the secretion of leptin, 21 normally ovulating women were recruited from those scheduled for ovariectomy plus hysterectomy performed in mid-follicular phase of the cycle. ...