First of all, the Nandrolones don't influence progesterone, they imitate them. The nandrolones stimulate progesterone receptors. The major problem we see is elevated prolactin levels. There are two ways to combat the proalctin problem. One is with Dostinex. Dostinex is much safer and easier to dose than bromo, for one. Two, it is the drug of choice for safely and rapidly lowering prolactin levels. Three, this med works for everyone. The only downside is the cost of the med.
The second approach is to try to block progesterone receptors. Stanozolol (winstrol) is pretty effective at blocking progesterone receptors. That is why I suggest stacking Winstrol with the Nandrolones. Of course, all of this is predicated on the athlete using doses of around 400-600mg total nandrolone weekly or less.