<prompt> In the perspective of the busy life schedule in the modem society, the accepted minimum period of sexual cohabitation resulting in no offspring for a couple to be declared infertile is:One yearOne and a half-yearTwo yearsThree year  <response>: Ans. is a i.e., One year If a couple fails to achieve pregnancy after one year of unprotected and regular intercourse, it is an indication to investigate the couple 