Multiple linear regressions investigating together all the associated factors and the cumulative dose of hCG administered in 24 months, confirmed a significant correlation of smaller BTV after treatment with cryptorchidism (p = 0.02), complete forms of CHH (p = 0.03) and a tendency to associate with homozygous or hemizygous variants (p = 0.09) (Fig. 1). Here, RMRP is linked to cryptorchidism.