[6] One month after the announcement of Higgs boson discovery in the summer of 2012, Berglund left CERN as the experiment facility was closing for an upgrade over the next two years.
After deciding to stop using the contraceptive pill, she began to analyse her body temperature in order to reveal the days when she was most fertile.
[7] "I wanted to give my body a break from the pill," she explained, "but I couldn't find any good forms of natural birth control, so I wrote an algorithm for myself.
[6] The couple gave up their physics jobs and moved to Sweden to concentrate on developing and marketing the app, founding the company Natural Cycles in 2013.
[4] It was only in February 2017 that they finally received approval from the German inspection and certification organisation Tüv Süd, allowing them to market the product throughout Europe.