The cause of PCOS is not totally clear, but one factor that is thought to play a part is insulin resistance, which is why there might be a slight increased risk of type 2 diabetes. Some women with PCOS are treated with Metformin which is a drug used to treat type 2 diabetes.
But remember there are other risk factors for type 2 diabetes, and being overweight from PCOS and/or medication doesn't automatically mean you will get type 2 diabetes.
There has been a bit of a debate as to whether I have it or not - one GP said yes, whilst another said no so I'm not too sure where I stand. But I understand your worries and your struggles, particularly with weight loss.
I hope this helps.
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