Category Archives: Endocrinology

T3 and reverse T3: Slight differences, considerable clinical consequences

Thyroid disorders are fairly commonplace in medical practice. Most people have either heard of or know an individual that has hyperthyroidism (e.g. Grave’s disease) or hypothyroidism (e.g. Hashimoto’s disease). The thyroid gland is a butterfly-shaped gland in the throat. The … Continue reading

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Hormonal changes in menopause: Is it all downhill from here?

The last several weeks, this blog has discussed hormones during the reproductive cycle  as well as neuro-endo connections (e.g.  serotonin, estradiol, testosterone, dopamine, progesterone, and GABA).  This week we will look at hormonal changes approaching menopause. Around age 38 the … Continue reading

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Oh baby! Did you know immune function can affect fertility?

Fertility issues can cause a lot of heartache for couples who are having difficulty conceiving.  According to the CDC, about 10% of reproductive-age women are infertile.  Infertility, however, is not always simply an endocrine imbalance.  Chronic stress and immune system … Continue reading

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Progesterone and neurotransmitters: the under-recognized relationship

Hormones and the nervous system are linked in ways that may not be obvious. In recent weeks, we’ve explored the connections between estrogen and serotonin and testosterone and dopamine. Progesterone is another hormone that has many implications in the nervous … Continue reading

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What do you do when counting sheep just doesn’t cut it? Look at neurocircuitry!

Most of us can attest to having trouble getting a good night’s sleep from time-to-time. We lie awake worrying about something that happened during the day, or the room is the wrong temperature or a scary movie we just watched … Continue reading

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Dopamine and testosterone – two important pieces of the neuroendocrine puzzle

Barry Bonds, Marion Jones, Roger Clemons, Manny Ramirez…the list of athletes that have made the news for taking performance enhancing drugs is long and seems to grow daily. These news stories put hormones such as testosterone in a negative light, … Continue reading

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