<prompt> In the perspective of the busy life schedule in the modern society, the accepted minimum period of sexual cohabitation resulting in no offspring for a couple to be declared infertile is:One yearOne and a halfTwo yearsThree years  <response>: Infertility implies apparent failure of a couple to conceive.If a couple fails to achieve pregnancy after 1 year of unprotected and regular intercourse,it is an indication to investigate the couple. 