If orally micro-dosing 5.x ng/ml of nandrolone is so powerful, and can be kept hidden for years, seems like we shouldn't have had to wait until 2018 for Houlihan's level of performances from non-Africans, especially from countries without USDA inspectors or with wild boars, or that do not practice boar castration.
Recall up until ~2004, the limit for women was 5 ng/ml, and even today, if you take the right kind of birth control, the limit is 15 ng/ml.
She had that amount when tested, certainly you can imagine more a day or two prior ... ?