CHIMERA MOMS. DNA is typically a reliable way to prove a relationship. But what happens when DNA testing "proves" women are not the mothers of their own children? The stories of two women – one who faced losing custody of her children and battled a baffling medical mystery.

TWIN SEX CHANGE. Juanita and Liana grew up as identical twins. But Juanita always had a nagging feeling that something was not quite “right.” Years later, Juanita finally decided to become Juan. Both Juanita and Liana talk about Juan’s struggle, what it means to them as twins, and what makes us who we are.

GENETIC ATTRACTION. It is perhaps, the most “forbidden” love – what happens when family members find themselves attracted to one another? A woman who gave up her baby for adoption when she was a teenager. Later, when she meets her now full-grown son, she falls in love. Is there a science behind what is known as “genetic attraction?” Three family members speak about this “taboo” subject, and a scientific expert explains what may be going on.

TWINS SEPARATED AT BIRTH. Identical twins are fascinating – they can look the same, can act the same and often share similar thoughts even when he or she is unaware the other twin exists. Marti and Stephanie were separated as infants and adopted by families living just four hours apart. Then, in their thirties, they were reunited for the first time. A look at two women who prove blood, and DNA, is a tie that binds.