Results 241 to 250 of about 334,002 (313)

Immunologic Cross-reaction Between Human Chorionic Gonadotropin and Human Pituitary Gonadotropin

Endocrinology, 1964
The capacity of human pituitary gonadotropin (NIH-HPG-UE) to absorb antibodies to HCG was measured in 7 experiments utilizing 2 rabbit and 1 sheep anti-HCG preparations. Maximum estimates of the degree of immunologic cross-reaction between NIH-HPG-UE and HCG varied from 34 to 87 % for the different antisera. One minimum estimate was 38%.
W E, PAUL, G T, ROSS
openaire   +2 more sources

Modulation of Pituitary Gonadotropin Response to Gonadotropin-Releasing Hormone by Estradiol

The Journal of Clinical Endocrinology & Metabolism, 1974
ABSTRACT This study was designed to investigate the possibility that estradiol-17β plays a role in the initiation of the surge of gonadotropins at midcycle by increasing pituitary responsiveness to hypothalamic gonadotropin-releasing hormone (GnRH). The effect of estradiol-17β on pituitary response to 50 μ GnRH was studied in 15 women on day 2 of the ...
W R, Keye, R B, Jaffe
openaire   +2 more sources

PITUITARY GONADOTROPINS IN GONADAL DYSGENESIS

Pediatrics, 1960
Four prepubertal girls with gonadal dysgenesis whose urine contained pituitary gonadotropin have been studied at various ages at the University of California Medical Center; considerable variation in urinary gonadotropin has been noted in three. Urinary gonadotropin levels should be determined in each case where the diagnosis of gonadal ...
openaire   +1 more source

Pituitary Gonadotropins and Multiple Births in Nigeria

Acta geneticae medicae et gemellologiae, 1972
Radioimmunoassay of FSH and LH serum levels has been carried out on 15 Nigerian women, 6 of them mothers of singletons and 9 mothers of twins (2 of two sets). Higher FSH levels have been found in mothers of twins, which supports the view that a higher production of pituitary gonadotropins, resulting in a higher incidence of multiple ovulation, may be ...
openaire   +2 more sources

Pituitary gonadotropins FSH and LH are oppositely regulated by the activin/follistatin system in a basal teleost, the eel.

General and Comparative Endocrinology, 2012
S. Aroua, Gersende Maugars, S. Jeng, Ching-Fong Chang, F. Weltzien, K. Rousseau, S. Dufour   +6 more
semanticscholar   +1 more source

Gonadal hormone feedback on pituitary gonadotropin genes

Trends in Endocrinology & Metabolism, 1996
The pituitary gonadotropins LH and FSH, which act on the ovaries and testes to promote gametogenesis and sex steroid production, are regulated by changes in the levels of steroids and gonadal peptides. Steroid feedback can be positive, as demonstrated by the estrogen and LH surge at ovulation, or negative, as demonstrated by the rise in LH and FSH ...
openaire   +2 more sources

Inherent capacity of the pituitary gland to produce gonadotropins is not influenced by the number of ovarian follicles > or = 3 mm in diameter in cattle.

Reproduction, Fertility and Development, 2010
F. Mossa, F. Jimenez-Krassel, S. Walsh, Donagh P. Berry, S. T. Butler, J. Folger, George W. Smith, J. Ireland, P. Lonergan, James J. Ireland, A. Evans   +10 more
semanticscholar   +1 more source

Isolation and characterization of two distinct gonadotropins, GTHI and GTHII, from bonito (Katsuwonus plelamis) pituitary glands.

International journal of peptide & protein research, 2009
Yoshio Koide, H. Itoh, Hiroshi Kawauchi
semanticscholar   +1 more source

Differential production and regulation of gonadotropins (GTH I and GTH II) in the pituitary gland of rainbow trout, Oncorhynchus mykiss, during ovarian development

Cell and Tissue Research, 1991
N. Naito, S. Hyodo, N. Okumoto, A. Urano, Y. Nakai   +4 more
semanticscholar   +1 more source

Isolation and characterization of two distinct gonadotropins from chum salmon pituitary glands.

General and Comparative Endocrinology, 1988
Kunimasa Suzuki, Hiroshi Kawauchi, Yoshitaka Nagahama   +2 more
semanticscholar   +1 more source