if you feel the need to use hcg when cruising, then you can throw it in every 3 months in increments of 4 weeks but most don't ever find it necessary... i would not use it any more than that.... 1000 ius week... or perhaps 3 times a year... its really up to you as to whether or not you use it... as Rick pointed out, hcg can increase estrogen but has no impact on prolactin