Pathophysiology of Polycystic Ovary Syndrome (PCOS)
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Polycystic ovary syndrome (PCOS) is characterized by which primary pathophysiologic mechanism:
O Premature ovarian failure
O Excess progesterone secretion
O Decreased estrogen production
O Increased insulin resistance leading to hyperandrogenism
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Hello! Today we are looking at the pathophysiologic mechanisms of Polycystic Ovary Syndrome, or PCOS. This is a complex endocrine disorder, so let's break down the main features.
Understanding PCOS Pathophysiology
PCOS involve three main interlocking components: hormonal imbalances, metabolic issues, and ovarian changes. Let's list those out.
1. Hyperandrogenism
2. Insulin Resistance
3. Ovulatory Dysfunction
A key driver in many cases is insulin resistance. When the body's cells don't respond well to insulin, the pancreas produces more to compensate.
This high level of insulin, known as hyperinsulinemia, acts on the ovaries to stimulate the production of androgens, specifically testosterone.
Hyperandrogenism then interferes with the normal development of follicles, leading to the characteristic 'cysts' seen on an ultrasound and causing irregular cycles.
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