I have made many moms from feminized seeds. You just have to remember that the seeds came from a plant that hermed out in flowering, which pollenates itself forming feminized seeds in the colas. Some strains I never had an issue with a herm problem. But sometimes you can get burnt, so watch them closely all the way through flowering, due to the possibilityof the plant herming and pollinate plants giving you an abundance of feminized seed in your plants, which could be bad news. If you do see 1 or 2 herming remove them immediately and cut if it is far enough along, hopefully the others will not have been pollinated.