If ure planning on using hcg then nolva is a must.When used in conjunction with nolva HCG 's suppressive nature is blocked.check this study
Tamoxifen suppresses gonadotropin-induced 17 alpha-hydroxyprogesterone accumulation in normal men.Smals AG, Pieters GF, Drayer JI, Boers GH, Benraad TJ...