More possiple from an un clean work area, or breeding in the summer... or breeding in an area with others nearby, or being in one room with a male then walking in a "fem" room...or anything from Amsterdam, or anything from a grower/breeder who doesnt use a HEPA intake filter... I can go on and on...
But I can say a male is better than a hermi female, feminized hermi x hermi = hermi,males and females....