Acardia (Twin Reversed Arterial Perfusion Sequence) is a rare and one of the most bizarre congenital malformations occurring in multiple pregnancies. It affects 1 in 35. 000 pregnancies. Usually one twin shows absence of heart and other is structurally normal. https://www.diegojavierfares.com/best-price-Vinyl-Wall-Decal-Sticker-Gymnastic-Rings-815-quick-super/