In classic PCOS, women have very long, irregular cycles, more hair, have trouble losing weight, acne and dark patches of skin around the neck and belly, and multiple, stalled follicles. All these issues are due to high testosterone and high LH.
In skinny PCOS, women don’t have the above signs, but they tend to be hypoglycemic, and have just enough testosterone and luteinizing hormone imbalance to keep follicles from developing properly.
The result? Your fertility hormones are totally out of synch, and your follicles don’t develop. Or, if you do ovulate because the egg has been bathing in testosterone it isn’t a healthy egg, and can’t sustain development.