How hyperthyroidism affect the menstrual cycle?As i know it will inflict amenorrhea but how does it do so?
Answer:
I THINK (don't quote me, this is just my theory), in general there is thyrotropin-releasing factor (TRF) released from the hypothalamus which stimulates realese of thyroid stimulating hormone (TSH) from the pituitary --> thyroid stimulation. But TRF also stimulates prolactin release.
Increased Prolactin stimulates breast milk production, but also decrease sex hormones - hence the amenorrhoea. BUT i'm pretty sure this is the case for HYPOthyroidism.. as the brain is trying to stimulate the thyroid to release more.
I don't regard as it would occur surrounded by hyperthyroidism unless it was in actual fact like a lesser hyperthyroidism, with the primary problem self in the hypothalamus secrete to much TRF.
Hope this made sense.
addition:
This is a sturdy question, and to be honest I don't know if my answer is right. Prolactin decrease levels of oestrogen, or FSH ... something approaching that anyway... and that's how it would effectively cause amenorrhoea. That's why you don't gain periods (or catch pregnant for that matter) early post-partum while you're breast feed.
If you had an exceptional amount of prolactin, you may also notice some galactorrhoea (milky nipple discharge) I guess.
who told you that it will explanation amenorrhea?
thryoid has zilch to do with menstral cycle which are cause by other types of hormones, such as estrogen, progesterone, LH, FSH, etc; it is not caused by thryoid hormone at adjectives
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