Please, Please don't waste your money. I did one about 3 months ago. I was feeling awful and suspected low hormone levels, so I ordered one, payed alot of money, and it came back that I was perfectly normal. Everything was within the normal levels. After two weeks of worsening symptoms, I went to my doctor who did a proper test, all my hormone levels were actually in the gutter. Even now, 3 months later, I am still lower than I should be.
Don't waste, time, money or your blood.