normaly feminizing is caused by stress. there is a chemical you can use to induce female hormones although it is not guaranteed to cause your seed to fem some studies say it causes herming more. A very simple and easy way to fem your seeds is once you find a strain you like. Flower one of your girls for 2-3 weeks extra it will form a pollen sack or a set of balls take clippers and clip these balls off put them in a zip bag and take the pollen from this sack and pollenate a flower on a HEALTHY female of the same strain or cross breeed if you want and the bud you pollenated will produce female seeds. If you use this rodelization method when you pollenate a bud on your lady use one of the lower buds it will produce plenty of seeds and they are considerably smaller than your top colas which you want to save for smoke