Faith and Hope Williams Born November 26, 2008 - in Great Britain. They are attached from their chests to the lower part of their stomachs.
December 2, 2008 - Undergo an 11-hour surgery to separate them. Hope dies just hours later.
December 25, 2008 - Faith dies from complications of the separation and subsequent surgeries.
Preslee Faith and Kylee Hope Wells Born October 25, 2008 - in Oklahoma City, Oklahoma, to Stevie Stewart and Kylie Wells. They are attached at the chest and are believed to be the first Native American conjoined twins.
January 19, 2009 - Separated at Children's Hospital at OU Medical Center in Oklahoma City, Oklahoma. Both survive though are listed in critical condition after the surgery.
February 19, 2011 - Preslee Faith Wells dies at The Children's Center in Bethany, Oklahoma..
Angelica and Angelina Sabuco August 2009 - Born in the Philippines to Fidel and Ginady Sabuco. They are joined at the chest and abdomen..
November 1, 2011 - Are successfully separated after a 10-hour surgery at Lucile Packard Children's Hospital, San Jose, California.
Hassan and Hussein Benhaffaf Born December 2, 2009 - in London to Angie and Azzedine Benhaffaf from east Cork, Ireland. They are attached at the chest but share no major organs.
April 8, 2010 - Undergo a 14-hour separation surgery at Great Ormond Street Hospital. Both survive.
Left Sister and Right Sister Born May 5, 2011 - in China to Liao Guojun and his wife. They share one heart and part of another, one trunk, one pelvis, one spleen, one gallbladder and one reproductive system; each has a fully developed skull. Initial X-rays show they have two spines, two esophagi, two stomachs, two sets of lungs and two separate nervous systems.
Joshua and Jacob Spates Born January 24, 2011 - in Memphis, Tennessee to Adrienne Spates. They are joined back to back at the pelvis and lower spine, each with separate hearts, heads and limbs.
August 29, 2011 - Are successfully separated after a 13-hour surgery.
Rital and Ritag Gaboura Born September 22, 2010 - in Khartoum, Sudan to Abdelmajeed and Enas Gaboura. They are joined at the head.
August 15, 2011 - Are successfully separated after a four-stage operation. Two operations took place in May, one in July and the final operation in August.
Allison June and Amelia Lee Tucker Born March 1, 2012 - to Shellie and Greg Tucker. They are attached at the lower chest and abdomen and share their chest wall, diaphragm, pericardium and liver.
November 7, 2012 - Are successfully separated after a seven-hour surgery.