“…A barrier can be achieved by two strategies; one uses agents and the other is physical or mechanical. Agents act as a barrier, can be solid form, liquid form (hydroflotation agents) or gel form, and the components include polyethylene oxide–sodium carboxymethylcellulose gel and crosslinked hyaluronic acid (CHA) gels [ 71 , 81 , 82 , 96 , 97 , 98 , 99 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 120 , 148 , 149 , 154 , 155 , 156 ]. Physical or mechanical barriers include intrauterine suitable balloon catheters, Foley balloon catheters, Malecot catheters, silicone sheets, and intrauterine devices (IUD) [ 73 , 103 , 104 , 105 , 106 , 107 , 108 ].…”