Knowing that nandrolone is a progestin, and elevated progesterone can trigger a girl's period, I was wondering how NPP affects your menstrual cycle (and libido) compared to other steroids.
That really depends from person to person. In general terms a woman that is natural can lose her period due to low body fat sub 12% that being said not all woman do because again the it is very individual.
I will use my self as an exmaple now first cylce I lost my period when I was not that lean yet like 19% each cycle after that it would take longer and longer to lose my period. Last contest cycle I never really completely lost it 2-3 days light spoting. I think my body adjusted to being at lower body fat levels as well as the use of diffrent compounds over the years.
Again this is all very individual so really can't get into the specifics for each woman this is going to very greatly.