NEW YORK (360Dx) – Smartphone accessories can be a lot more useful than selfie extensions. One new add-on — a diagnostic test prototype — may help men determine whether they're fertile or not. 

The cell phone accessory analyzes sperm concentration and motility with 98 percent accuracy, a level that competes with computer-assisted testing and is better than manual testing, Hadi Shafiee, a principal investigator at Brigham and Women's Hospital, a nonprofit teaching affiliate of Harvard Medical School, said in an interview.