Sunday, May 1, 2016
We discuss how total testosterone levels were predicted by sonographic markers of ovarian morphology, not hirsutism scores; and how the predictive value of ovarian morphology for total testosterone differed by menstrual cycle status.
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Monday, February 1, 2016
Antimullerian hormone, which elevates from birth to 18 years of age and declines thereafter, is positively correlated with androgen levels in adolescent and reproductive-aged women.
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Monday, November 30, 2015
In normally cycling premenopausal women, SHBG concentrations, independently from other parameters, are negatively associated with bioavailable T and positively associated with adiponectin.
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Monday, June 29, 2015
Men with decreased general health status have lower sperm concentration, lower testosterone levels, and higher follicle-stimulating hormone values. Poorer health status appears associated with a malfunctioning male reproductive system.
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Wednesday, April 29, 2015
Sleep loss can promote marked changes in the male reproductive system in rodents, affecting especially the spermatic function by means of NO pathway modulation.
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Monday, December 29, 2014
Molybdenum and several other metals were associated with altered testosterone in men, which may have important implications as altered testosterone has been linked to many adverse health effects.
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Sunday, June 1, 2014
Magnetic resonance imaging yielded higher antral follicle counts (AFC) than previously reported. AFC, antimullerian hormone, and free testosterone discriminated with high accuracy between women with polycystic ovary syndrome and controls.
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Monday, March 31, 2014
Extraction chromatography–radioimmunoassay and liquid chromatography–tandem mass spectrometry measurements of testosterone have similar performance for differentiating polycystic ovary syndrome from controls; different cutoff values should be considered depending on the setting (e.g., clinical vs. general populations).
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Tuesday, December 31, 2013
In Canada, testosterone is not commonly used by men presenting for fertility investigation (1.3%). Testosterone cessation generally resulted in an increase in sperm counts. A subset of men remained azoospermic.
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Monday, September 30, 2013
Female sexual dysfunctions (FSDs) may present as major emotional disturbances adversely affecting family and workplace. Although highly effective treatments exist, physicians frequently do not ask women about FSD.
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Monday, September 30, 2013
Reflections on "Successful testicular sperm retrieval in adolescents with Klinefelter syndrome treated with at least 1 year of topical testosterone and aromatase inhibitor" by Mehta et al.
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Monday, September 30, 2013
Sperm retrieval and cryopreservation is possible in adolescents with Klinefelter syndrome who are actively being treated with topical testosterone replacement therapy.
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Friday, May 31, 2013
There is little evidence to support hormone replacement in older males with normal levels. Men with vitamin D deficiency and hypogonadal males, in some cases, benefit from hormone replacement.
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Friday, May 31, 2013
Body mass index correlation with sex hormones is exponential for testosterone and power for sex hormone–binding globulin (SHBG). Bariatric surgery improves all parameters with a higher than expected (for corresponding weight loss) increase of total testosterone and SHBG.
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Wednesday, January 2, 2013
Reflections on "Serum insulin-like factor 3 is highly correlated with intratesticular testosterone in normal men with acute, experimental gonadotropin deficiency stimulated with low-dose human chorionic gonadotropin: a randomized, controlled trial" by Roth et al.
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Wednesday, January 2, 2013
As decreased ovarian testosterone production with age may compromise ovarian stimulation, we review maneuvers aimed at increasing ovarian testosterone and the likely potentiating effects of insulin-like growth factor I.
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Thursday, November 29, 2012
Aromatase inhibitors increase serum testosterone levels and can improve sperm production for infertile men with low serum testosterone and increased testosterone/estradiol ratios.
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Thursday, November 1, 2012
Peritubular cell secreted factor(s) may modulate T production by Leydig cells in a nonclassic mode, independent of StAR gene expression even in a gonadotropin-deficient environment.
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Thursday, June 21, 2012
This study suggests that in thalassemic men, blood transfusion is associated with significant acute enhancement of sperm parameters and increased concentrations of serum T, LH, FSH, and IGF-1.
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Thursday, May 31, 2012
Ovarian stimulation before conception is associated with significant elevations in first-trimester testosterone. Further studies are needed to evaluate the effect of early pregnancy testosterone on outcomes.
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Thursday, May 31, 2012
This randomized placebo-controlled study demonstrated that low-dose testosterone administration decreases natriuretic peptide levels in women.
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Fertility Sterility Discussion