ACE2 and endometriosis: Comparing two groups of women with and without endometriosis showed no difference in the frequency of COVID-19 infection, which is contrary to the initial hypothesis of our study, as we assumed that patients with endometriosis, an inflammatory disease, have a greater susceptibility to COVID-19 infection, because of their baseline disorder in the immune system, as well as the evidence on the expression of ACE2 in the endometrial tissue [15, 18].