“…Thirty-three studies had information pertinent to this topic, including six in Africa [ 43 , 47 , 87 , 104 , 107 , 122 ], nine in the Americas [ 44 , 46 , 57 , 103 , 133 – 137 ], five in Asia [ 45 , 63 , 64 , 83 , 114 ], nine in Europe [ 51 , 52 , 60 , 67 , 88 , 97 , 109 , 110 , 138 ], two in Oceania [ 106 , 139 ], and two in multi-country studies [ 50 , 140 ]. In studies across multiple countries, including Mali, Kenya, South Africa, Brazil, Spain, the Dominican Republic, Canada, the US, and the UK, regular menstruation was viewed by many women as a marker of health and fertility, as well as providing reassurance of not being pregnant [ 47 , 50 , 51 , 57 , 87 , 103 , 133 – 135 , 137 , 138 ].…”