no theres no way that could happen for the females to produce seeds,some type of pollen was introduced to your growing area.are you inside or out?did you take proper steps to ensure all the hermi pollen from your last crop was cleaned from your fans,venting ,lighting etc.even the smallest amount of pollen could have survived the clean up and caused this crop to be pollinated too.judging by the number of plants with seeds id say this is what happend if their was one plant that had turned into a hermi most of your plants would be showing seeds instead of just 3 or 4.a cool thing about this is that the seeds from your pollinated plants will produce all female seeds although their genes may be slightly mutated.the big seed companies use something called gerbilic acis to induce a male sex organ on a selected female of the highest quality,thus self pollinating the plant,inbreeding it and causing all resulting seeds to be mostly female with a few hermis to wean out.kinda cool if you ask me,it gives the home grower/breeder an easy way to have an all female crop with out clones,or spending a fortune on the technology.if you happen to be outside and in an area with either wild of industrial hemp farms the pollen from the hemp could have found its way to your plant.in holland they put the cannabis pollen count on the news because it is so widely cultivated it bothers many people like any other pollen would ,eventhough most of these people with allergies to hemp pollen can smoke it just fine the pollen acts as an allergen to their respiratory system.to spite this my dream is to have cannabis so widely cultivated that the cannabis pollen count will be on all of our local weather reports JOHNNY CHRONIC SEED