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Corina Verónica Sasso, Flavia Eliana Santiano, Fiorella Campo Verde Arboccó, Leila Ester Zyla, Silvana Noemí Semino, Martin Eduardo Guerrero-Gimenez, Virginia Pistone Creydt, Constanza Matilde López Fontana and Rubén Walter Carón

should also consider progesterone (P4) as another of the ovarian steroids involved in this disease. There are some studies reporting the absence of the expression of progesterone receptor (PR) in colon tumors and no effect of progestins on carcinogenesis

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A Rehfeld, D L Egeberg, K Almstrup, J H Petersen, S Dissing and N E Skakkebæk

-mediated Ca 2+ influx ( 9 ). CatSper is activated by the natural ligands progesterone and prostaglandins ( 10 , 11 ), which lead to a rapid Ca 2+ influx into the sperm cell. The cumulus cells surrounding the egg release progesterone and the progesterone

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Jordyn Silverstein, Wesley Kidder, Susan Fisher, Thomas A Hope, Samantha Maisel, Dianna Ng, Jessica Van Ziffle, Chloe E Atreya and Katherine Van Loon

studies have sought to evaluate the expression of estrogen receptors (ERs) and progesterone receptors (PRs) in colorectal tumor cells, results have been mixed. Earlier studies reported that 20–90% of CRC tumors express ER and PR ( 19 , 20 , 21 ); however

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Anne M Drewes, Maria E Møller, Rasmus Hertzum-Larsen, Gerda Engholm and Hans H Storm

increased risk of brain tumour in premenopausal women with breast cancer and a protective effect in postmenopausal women, hormonal levels (oestrogen and progesterone) could possibly have a role in the risk for developing a second primary brain tumour

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Arpna Sharma, Vijay Simha Baddela, Frank Becker, Dirk Dannenberger, Torsten Viergutz and Jens Vanselow

the test groups with highest fatty acid concentrations. Steroid hormone estimation Concentrations of 17β-estradiol (E2) and progesterone (P4) in the conditioned media were determined by competitive 3H radioimmunoassay (RIA) with rabbit

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Elizabeth Micks, Greta B Raglan and Jay Schulkin

Introduction Progesterone, progestins, and progestogens Progesterone is a C-21 steroid hormone first identified and characterized by Willard Myron Allen in 1933. C-21 steroid hormones contain 21 carbons and are also referred to as pregnanes. This

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Katarzyna Wyskida, Grzegorz Franik, Tomasz Wikarek, Aleksander Owczarek, Alham Delroba, Jerzy Chudek, Jerzy Sikora and Magdalena Olszanecka-Glinianowicz

the menstrual cycle in both ovulatory and anovulatory women. Additionally, in some ( 13 ), but not in other studies ( 14 ), the association between changes in plasma leptin levels and variations of both estradiol and progesterone release were observed

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Kerry V Fanson, Tamara Keeley and Benjamin G Fanson

( Elephas maximus ). In concert with progesterone data, we present an extensive examination of cortisol patterns across the estrous cycle in both parous and nulliparous females ( Table 1 ). First, we characterized the broad patterns of cortisol expression

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David Mark Robertson, Chel Hee Lee and Angela Baerwald

). The key ovarian factors believed responsible are the steroids, oestradiol and progesterone, and the protein hormones, inhibin A and B. However, their respective roles are not clearly understood. In a previous study (( 2 ), and ( 3 ) designated in

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T P Parikh, B Stolze, Y Ozarda, J Jonklaas, K Welsh, L Masika, M Hill, A DeCherney and S J Soldin

or downstream hormones within the steroid synthesis pathway ( 4 , 5 , 6 ). A recent preliminary study comparing 8 AM and midnight samples on a small cohort of controls, suggests that significant diurnal variation in all but progesterone probably