Multiple Births
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- Twins Days Official Web Page
- The official site of Twins Days, which takes place every year in Ohio.
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- Twins Days - the Unofficial Homepage
- Information on Twins Days, as well as links to Twins Days photos, and a FAQs.
- 23
- Good Quads
- Purchase the book about Britain's most famous quads. Born in 1948, at Southmead Hospital, Bristol, the quads became famous for being the first to survive caesarean section delivery.
- 25
- Australian Twin Registry
- Includes a newsletter, registry for twins, study information and conferences.
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- Twin Studies
- From the Institute of Behavioral Genetics at the University of Colorado. A handful of studies for twins of all ages.
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- Twins Personality Survey
- A twin survey on personality, conducted by researchers at Virginia Commonwealth University.
- 29
- ABC Club
- The largest German organisation for families with higher multiple birth children, from triplets onwards.
- 30
- National Organization of Mothers of Twins Clubs, Inc.
- Official site; a non-profit, nation-wide support group for parents of twins and higher order multiple birth children.
- 31
- NOVA Transcripts: Siamese Twins
- Transcript of the Emmy winning documentary about Thai twins Dao and Duan, brought to the US for separation in 1993, and adopted.
- 33
- Living a conjoined life
- The BBC reports on conjoined twins determined to live the normal, active life of outgoing 20-somethings anywhere. (April 25, 2013)
- 34
- Conjoined Twins Profile: Ahmed and Mohamed Ibrahim
- Profile of Egyptian conjoined twins Ahmed and Mohamed Ibrahim who underwent separation surgery in Dallas in October 2003.
- 35
- Surviving Siamese Twin Gracie Goes Home to Gozo
- The baby known as 'Jodie' (Gracie Attard) in court papers, now ten months old, is progressing well and ready to leave hospital. [Telegraph] (June 16, 2001)
- 36
- Jodie and Mary: The medical facts
- Overview of the case, diagram of the twins' bodies and shared circulatory system, and links to other coverage. [BBC News] (December 07, 2000)
- 37
- Conjoined Twins Profile: Maria Teresa and Maria de Jesus Quiej-Alvarez
- Profile of conjoined twins Maria Teresa and Maria de Jesus Quiej-Alvarez with details of their surgical separation in August 2002.
- 38
- Face To Face: The Schappell Twins
- Purchase this documentary, the story of Lori and Reba Schappell. Despite their problems, the twins dream of marriage and careers and lead normal daily lives.