Contraceptive or a method to control or prevent pregnancy by preventing sex or meeting of ovum with sperm is the most desired one by a fertile couple.There are more than a dozen medically approved methods of birth control, including condoms, the pill and implants. Now for the first time, a cell phone app not a drug or device or implant has been certified as a method of birth control in the European Union. Its creator is a particle physicist who was part of the team that won the Nobel Prize in Physics in 2013.

Not long after she helped discover the elusive subatomic particle known as the Higgs boson, she left her job and went searching for answers to a different mystery: how to create an app to prevent pregnancy. She and her husband launched the app, in Sweden in 2014. It relies on a woman's recorded daily temperature — taken with a highly accurate thermometer — and details about…