Agreed...the big names in HRT do suggest DHEA and Preg as needed (back filling the pathways)...checking with blood tests first.
Personally I do take HCG, and reduced my DHEA dose from 50 twice a day to 50 once a day when I started back on HCG in order to lower a potential source of estrogen boosting... with preg I somewhat use it as needed as anti-anxiety in low doses (50mg time release tabs).