the Conjoined twins are monozygotic multiples that do not fully separate from each other due to the incomplete division of the fertilized ovum. The individuals will be connected at certain points of the body, and may share tissue, organs or limbs. The photos in this gallery are of conjoined twins. In some pictures, the twins remain conjoined. Other photos depict the twins after surgical separation. Conjoined twins, also known as Siamese twins, are a rare type of monozygotic (identical) twins. Find more answers to Frequently Asked Questions About Conjoined Twins.