I'm not sure its possible during a veg period for the plant to turn hermi, which is a flowering response of sorts
i have never seen a plant in preflower, (late veg) show hermi traits not saying its not possible,
i have only seen plants preflower showing either male or female preflowers
if it turns hermi this happens during a flowering photo period or when the light cycle reaches 9-12 hours of darkness
a true hermi that has both individual male and female flowers from the start of the flower is very rare and is just a natural genetic defect of sorts,
depends what way you look at it , these are not "turned" they just are
i think if it were given a regular dark period of 12 hours to start the flowering response for 4-5 days
then after this a veg period of 18+ hours one day and a flowering period of 12 hours the next day
the plant would be stuck between the 2 cycles on a daily basis i think this would stress it best LOL
peace