Results 51 to 60 of about 24,396 (278)
Frontiers in Endocrinology, 2020 As the male reproductive organ, the main task of the testis is the production of fertile, haploid spermatozoa. This process, named spermatogenesis, starts with spermatogonial stem cells, which undergo a species-specific number of mitotic divisions until ...
Michelle Thönnes +6 more
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An unusual cause of gynaecomastia in a male [PDF]
Summary: Beta-human chorionic gonadotropin (βhCG) is normally produced by syncytiotrophoblasts of the placenta during pregnancy and aids embryo implantation.
Bano, G +4 more
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Hypervision Proton Surgery: The Future Direction of Proton Therapy
iNew Medicine, EarlyView.ABSTRACT Proton beams provide unique physical advantages characterized by a low entrance dose, negligible exit dose, and a sharp Bragg peak, which enable superior sparing of normal tissues and support safe dose escalation for improved tumor control. However, conventional photon‐based fractionation remains widely used in proton therapy, where prolonged ...
Li Li, Shuanghu Yuan
wiley +1 more source
Medicine Science, 2014 Diabetic hyperglycemia has a direct association with microscopic changes of testicular tissue and spermatogenic alterations. Most of these changes are mediated with oxidative stress.
Davoud Kianifard, Leila Kianifard
doaj +1 more source
Pituitary stalk interruption syndrome in Chinese people: clinical characteristic analysis of 55 cases. [PDF]
PLoS ONE, 2013 OBJECTIVE: Pituitary stalk interruption syndrome (PSIS) is characterized by the absence of pituitary stalk, pituitary hypoplasia, and ectopic posterior pituitary. Due to the rarity of PSIS, clinical data are limited, especially in Chinese people. Herein,
Qinghua Guo +19 more
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Functional Divergence of Glycoprotein Hormone Receptors [PDF]
Two lamprey glycroprotein hormone receptors (lGpH-R I and II) highly similar with gnathostome GpH-Rs were cloned from sea lamprey testes and thyroid, respectively.
Freamat, Mihael, Sower, Stacia A.
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On the Purifiication of Reptilian (Turtle) Pituitary Gonadotropin
Experimental Biology and Medicine, 1972 SummaryTurtle (Pseudemys scripta) pituitaries have been homogenized, extracted with saline, and the gonadotropin partially purified by ammonium sulfate fractionation. The bulk of the gonadotropin was found to precipitate between 0.3 and 0.6 saturated ammonium sulfate which is similar to the solubility behavior of ovine LH. No separation of gonadotropic
H, Papkoff, P, Licht
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iNew Medicine, EarlyView.ABSTRACT Ovarian cancer (OC) continues to be the deadliest gynecological malignancy and a significant cause of cancer‐related mortality among women worldwide. Standard treatment strategies typically entail platinum‐based chemotherapy in conjunction with cytoreductive surgery.
Zunera Khalid +4 more
wiley +1 more source
The size of mature oocytes is similar across mammalian species, yet the size of ovarian follicles increases with species size, with some ovarian follicles reaching diameters more than 1000-fold the size of the enclosed oocyte.
Bächler, M. +3 more
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Extragonadal LH/hCG action-Not yet time to rewrite textbooks [PDF]
Gonadotropins are indispensable in both sexes in the regulation of gonadal sex steroid production and gametogenesis. In addition to their well-established classical actions, numerous recent publications have indicated the presence and function of ...
Ahtiainen, Petteri +5 more
core +1 more source