I think this is a Black and Yellow Argiope (Argiope aurantia). She built this web, complete with stabilimentum, inside an empty flower pot on my back porch. I carefully moved the pot to a safer spot at the back of my yard, and she relocated to inside my compost bin where she quickly grew to full adult size. I did not see her make the transition, so I am not 100% sure this is the same spider. I would appreciate confirmation on the species and sex, and if she is considered immature or adult at this point. Thanks in advance!