Unexplained infertility is a common issue affecting up to 30% of infertile couples. It occurs when no specific cause for infertility can be found after testing. This means that current treatments are not targeted towards the actual problem. The article suggests that focusing on the prognosis of each couple, rather than just the diagnosis, could lead to more effective treatments. By better understanding the reasons behind infertility, the number of couples labeled as having unexplained infertility could be reduced.