A new at-home male fertility product called Yo could make testing semen way less awkward. Yo turns a user’s phone camera into a microscope that’s able to zoom in on a semen sample and determine how many sperm exist and are moving, aka the motile sperm concentration. This isn’t the first time we’ve seen a company turn a smartphone camera into a microscope, although this is one of the first times we’ve seen it applied for male fertility.