Results 291 to 300 of about 76,840 (343)

Human chorionic gonadotropin tests

Expert Review of Molecular Diagnostics, 2009
Human chorionic gonadotropin (hCG) is not a single biological molecule. There is the regular form of hCG produced by differentiated syncytotrophoblast cells (regular hCG). This hormone primarily functions to maintain the myometrial and decidual spiral arteries, or the vascular supply of the placenta during the full course of pregnancy ...
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Determination of human chorionic gonadotropin

Best Practice & Research Clinical Endocrinology & Metabolism, 2013
Determination of human chorionic gonadotropin (hCG) is used for diagnosis and monitoring of pregnancy, pregnancy related disorders, for trophoblastic and some nontrophoblastic tumors. In addition, hCG is determined for doping control in males. Assay of hCG is complicated by the occurrence of different molecular forms, which are detected to various ...
Alfthan Henrik, Stenman Ulf-Håkan, Alfthan Henrik, Stenman Ulf-Håkan   +3 more
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Human chorionic gonadotropin in cancer

Clinical Biochemistry, 2004
Human chorionic gonadotropin (hCG) is mainly used for detection and monitoring of pregnancy and pregnancy-related disorders but it is also an extremely sensitive and specific marker for trophoblastic tumors of placental and germ cell origin. Thus treatment of relapsing choriocarcinomas and testicular germ cell tumors is often initiated on the basis of ...
Ulf-Håkan, Stenman, Henrik, Alfthan, Kristina, Hotakainen   +2 more
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Radioimmunoassay for human chorionic gonadotropin

American Journal of Obstetrics and Gynecology, 1968
Abstract A radioimmunoassay method for HCG utilizing I 125 for iodination and a chemical procedure for separation of free and bound HCG 125 are described. This method is more sensitive and more accurate than the hemagglutination inhibition technique.
Y, Tomoda, M M, Hreshchyshyn
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Withholding Gonadotropins Until Human Chorionic Gonadotropin Administration

Seminars in Reproductive Medicine, 2010
Withholding gonadotropins in women who exhibit high estradiol responses before follicles reach full maturation is called "coasting." Coasting, or suspending gonadotropin administration, can be an effective strategy for decreasing the risk of ovarian hyperstimulation syndrome (OHSS) while reducing cancelation rates.
Rony, Abdallah, Isaac, Kligman, Owen, Davis, Zev, Rosenwaks   +3 more
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Immunocytochemistry of human chorionic gonadotropin in human chorionic villi

American Journal of Obstetrics and Gynecology, 1987
The immunocytochemical localization of human chorionic gonadotropin was investigated in chorionic villi from the seventh to twelfth week of gestation. By the light microscopic peroxidase-antiperoxidase technique, positive reactions of human chorionic gonadotropin were found exclusively in the syncytiotrophoblast.
K, Hamasaki, Y, Okamura, H, Ueda, H, Kagawa, S, Fujimoto   +4 more
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Human chorionic gonadotropin in commercial human menopausal gonadotropin preparations

Fertility and Sterility, 1993
Several studies indicated the presence of an hCG-immunoreactive substance in commercial hMG preparations. Because hCG represents LH activity with a relatively very long half-life, differences between hMG preparations with respect to hCG content could imply clinical differences.
P G, Stokman, R, de Leeuw, H A, van den Wijngaard, H J, Kloosterboer, H M, Vemer, A L, Sanders   +5 more
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Studies of Human Chorionic Gonadotropin

1971
Publisher Summary This chapter focuses on human chorionic gonadotropin (HCG), a glycoprotein hormone produced by the placenta that appears in significant quantities in the urine during the first trimester of pregnancy. The mean level of urinary HCG produced during the first trimester is 30,000–50,000 IU in 24 hours, equivalent to a maximum of ...
R E, Canfield, F J, Morgan, S, Kammerman, J J, Bell, G M, Agosto   +4 more
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Human chorionic gonadotropin-secreting osteosarcoma

BMJ Case Reports
Secretion of beta human chorionic gonadotropin (β-hCG) is a rare, recently recognised paraneoplastic syndrome. Herein, we present a case of a woman in her 30s with right femur conventional high-grade osteosarcoma and a positive screening urine pregnancy test. Subsequent workup failed to reveal an intrauterine or extrauterine pregnancy.
Natalia Gabriela Sanchez, Andrew E Horvai, Emanuela Zacco, Varun Monga   +3 more
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Immunochemistry of Human Chorionic Gonadotropin

1984
In states of gestational trophoblastic disease, knowledge of the immunochemistry of human chorionic gonadotropin (hCG) is principally of value in relation to its use as a diagnostic tool and as a marker for the persistence of disease activity during chemotherapy (1, 2).
R E, Canfield, S, Birken, P, Ehrlich, G, Armstrong   +3 more
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