The most common type of receptor insensetivity is insulin insensetivity and minifests an type 2 diabetes. The receptors for LH and insulin are not psyiologically the same. As I understand it, the LH receptor cant become insensetive, as receptor activation involves a chemical bonding between receptor and activator molecules: receptor molecules simply decrease in the presense of increasing levels of stimulant.
This brings up the question of how much is too much. Note that hcg
mimics LH, FSH and TSH and that the serum concentrations of these hormones arent the same. A dose of hcg acts will contribute unequally to serum LH, FSH and TSH with LH being the most prominant and FSH the least.
It is quite possible to stimulate the thyroid. I and others have done it and the texts bear this possibility out. Thyroid stimulation certainly indicates too much as serum T3
,4 levels are well below LH.
The anechdodal evidence indicates that the boys plump up with hcg use. I have yet to see evidence that they lose mass but dont doubt that they would eventually.
Concerning individual doseage one must consider the condition of the Leydig cells, the LH, PRL, and ACTH secreting cells of the pituitary, the adrenal cortex, and the whole brain-body-health complex.
Thre is no way that anyone can tell you how much is too much without labs or you are in touch with yourself.