So, this study states that HCG or SERMS + HCG can restore/maintain virility.
This seems to suggest that a SERM (Nolva/Clomid) + HCG could be a PCT after a blast?
Same article, full-text
Preserving fertility in the hypogonadal patient: an update Ramasamy R, Armstrong JM, Lipshultz LI - Asian J Androl
This is from the link above:
For healthy patients who use exogenous testosterone and are unable to establish a pregnancy because of the deficient spermatogenesis, there are now solutions to reverse the negative impact of testosterone supplementation. In our experience treatment involves discontinuation of exogenous testosterone and administration of 3000 units of hCG (either with the aromatase inhibitor anastrozole or the selective estrogen receptor modulator tamoxifen or clomiphene citrate) intramuscularly every other day for 3 or more months. As higher doses of hCG are known to suppress FSH levels, simultaneous administration of clomiphene citrate not only preserves, but enhances the secretion of FSH and LH from the anterior pituitary. With such treatments, testosterone-induced azoospermia was successfully reversed with hCG therapy in nearly all men receiving treatment. While further studies need to be carried out, every-other-day intramuscular hCG therapy is a viable option in the treatment of men who suffer suppressed spermatogenesis due to testosterone replacement. However, recovery is not immediate; patient spermatogenesis returned in 4-6 months.