Though I enjoy a good yoga session as much as any middle-class white woman my age, my natural state is one of tooth-chattering anxiety. Anyone who knows me well could tell you that my yin and yang are not harmonious, but now I have the endocrine profile to prove it—a set of chromosome repeats in my DNA that has manifested itself in serious hormonal disruption, a.k.a. premature ovarian failure, a.k.a. early menopause.