Miscarriage to Motherhood:A Successful Journey Episode 6: Unexplained Miscarriages -Myth or Reality Repeated Miscarriages have some underlying cause. However, in 50% of couples with Repeated Miscarriages, there is no underlying cause is found. In such cases, there can be underlying Immunological cause. This can be confirmed by certain Immunological tests. So, the so called unexplained miscarriages are, in fact, not unexplained. Hence, unexplained miscarriages is a myth and not a reality!