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Sergio A Arispe, Betty Adams, and Thomas E Adams

special emphasis on studies in the ovine species . Archives of Physiology and Biochemistry 110 62 – 73 . ( doi:10.1076/apab. ) Clarke IJ Cummins JT 1984 Direct pituitary effects of estrogen and progesterone on gonadotropin

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Hiroto Kobayashi, Saori Yoshida, Ying-Jie Sun, Nobuyuki Shirasawa, and Akira Naito

Introduction Estrogen is an important factor to regulate the postnatal sexual maturation in the rat. For half a century, it has been reported that the steroid hormone evokes functions of uterine tissue, the brain, and the pituitary during postnatal

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Chirine Toufaily, Gauthier Schang, Xiang Zhou, Philipp Wartenberg, Ulrich Boehm, John P Lydon, Ferdinand Roelfsema, and Daniel J Bernard

and fertility are otherwise intact in these animals. The data suggest that progesterone-negative feedback at the level of the pituitary may be negligible, but that PR contributes to positive feedback effects of estrogens at this level of the HPG axis

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J J Whyte, A P Alexenko, A M Davis, M R Ellersieck, E D Fountain, and C S Rosenfeld

testosterone concentrations during the luteal phase of the cycle but lower estradiol concentrations ( Dorgan et al. 2003 ). In the light of these previous studies, we have examined the serum concentrations of testosterone, estrogen, progesterone, and

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B Poonia, L Walter, J Dufour, R Harrison, P A Marx, and R S Veazey

link’ in the squamous epithelium. Hormone levels Levels of serum progesterone and estrogen were examined from the seven macaques described above using a commercial Coat-A-Count kit (Diagnostic Products Co., Los

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C Dosiou, A E Hamilton, Y Pang, M T Overgaard, S Tulac, J Dong, P Thomas, and L C Giudice

Introduction Modulation of the immune system by progesterone in women has been suggested by a number of observations. First, the course and symptoms of autoimmune diseases change during pregnancy and different phases of the menstrual cycle. For

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José E Sánchez-Criado, Carmina Bellido, Rafaela Aguilar, and José C Garrido-Gracia

, Aguilar R & Blanco A 2004 Biological role of pituitary estrogen receptors ERα and ERβ on progesterone receptor expression and action and on gonadotropin and prolactin secretion in the rat. Neuroendocrinology 79 247 –258

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Natalia Pavón, Alfredo Cabrera-Orefice, Juan Carlos Gallardo-Pérez, Cristina Uribe-Alvarez, Nadia A Rivero-Segura, Edgar Ricardo Vazquez-Martínez, Marco Cerbón, Eduardo Martínez-Abundis, Juan Carlos Torres-Narvaez, Raúl Martínez-Memije, Francisco-Javier Roldán-Gómez, and Salvador Uribe-Carvajal

Introduction Estrogens (17β-estradiol, estrone and progesterone) control diverse reproductive system functions. Their participation in other physiological processes such as cognition ( Sherwin 1999 ), cardiovascular function ( Stevenson 2000

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K H Al-Gubory, S Camous, G Germain, P Bolifraud, A Nicole, and I Ceballos-Picot

cause of early embryonic loss and pregnancy failure in sheep and cattle ( Ayalon 1978 , Ashworth et al. 1989 , Shelton et al. 1990 , Thatcher et al. 1994 ). Thus, researchers have specifically proposed progesterone supplementation after breeding

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Christine Margaret Whitelaw, Jane Elizabeth Robinson, Peter Mark Hastie, Vasantha Padmanabhan, and Neil Price Evans

-releasing hormone neurons: estrogenic control of galanin gene expression . Endocrinology 139 939 – 948 . doi:10.1210/en.139.3.939 . Skinner DC Harris TG Evans NP 2000 Duration and amplitude of the luteal phase progesterone increment times the