In this episode, Maria Padron (Haverford ’19) talks about critical periods for hormone action during the development of the brain. As part of this, she discusses a study showing that gonadal hormones masculinize and defeminize reproductive behaviors during puberty in male Syrian hamsters (Schulz et al., 2004, Hormones and Behavior). Can this help us understand why the teenagers on Gossip Girl act the way they do? Tune in to find out!