A surprising link with unexplained infertility: a possible Covid-19 paradox?

Abstract Unexplained infertility has represented about 22-28 percent of infertility causes (1)The diagnosis is based on exclusion of common causes using standard fertility investigation. Over the years the causes of unexplained infertility or subfertility have been identified in pre-existing associated pathologies, such as alterations of the immune system, thyroid dysfunctions, coagulopathies, reducing the unexplained infertility to 15% of infertility causes