Natural conception method – "Jonas method" is a method developed by a Slovak doctor Eugen Jonáš in the middle of the 20th century. There are many articles and interviews with (today almost 90 years old!) psychologist Eugen Jonáš explaining the reason why he developed this method. Back in the day, he found his mission in helping women who suffered from infertility or had troubles getting pregnant. He claims that every woman can conceive naturally, she only needs to know when.