The disclosed collapsible medical device is used for occluding an opening used for fetoscopic surgery. The device comprises a tubular woven metal fabric comprised of a plurality of braided metal strands and having a proximal end and a distal end, and said fabric having an expanded preset configuration comprising two disk-shaped elements and a waist element wherein said two disk-shaped elements have diameters of about 5 mm wherein the waist element has a length of about one centimeter wherein the fabric is deformable to a lesser cross-sectional dimension for delivery through a channel in a patients body to said opening used for fetoscopic surgery, and the fabric having a memory property whereby the medical device tends to return to said expanded preset configuration when unconstrained.
