Boy or girl? Lemur scents have the answer. Duke Today, February 24, 2015. Dozens of pregnancy myths claim to predict whether a mom-to-be is carrying a boy or a girl. Some say you can tell by the shape of a woman’s bump, or whether she craves salty or sweet. Even ultrasound doesn’t always get it right. But for lemurs, the answer is in the mother’s scent. Picked up by the Daily Mail and Discover Magazine.