Like HowStuffWorks on Facebook!

How Twins Work


Lots More Information
Lots More Information

Related HowStuffWorks Articles

More Great Links

Sources

These are some sources that we found useful in researching this article:

Books

  • Stedman's Medical Dictionary, 27th edition
  • The Concise Science Encyclopedia, Kingfisher Publications
  • Entwined Lives: Twins and what they tell us about human behavior by Nancy L. Segal, Ph.D.
  • Twins and What They Tell Us About Who We Are by Lawrence Wright
  • Twins: An Uncanny Relationship by Peter Watson
  • Twins! Pregnancy, Birth and the First Year of Life by Connie Agnew, M.D., Alan Klein, M.D. and Jill Alison Ganon
  • The Art of Parenting Twins by Patricia Maxwell Malmstrom and Janet Poland

Articles, Journals and Periodicals

  • National Vital Statistics Reports
  • "Fetus In Fetu: A Case Report" by SV Phatak, PK Kolwadkar, MS Phatak: Ind J Radiol Imag 2003 13:1:93-94
  • "Larger Women More Likely to Have Twins" by Emma Baines, GP: Obstet Gynecol 2005
  • "Twin Language: A Risk Factor for Language Impairment?" by D.V.M. Bishop, S.J. Bishop: Journal of Speech, Language & Hearing Research, February 1998, Vol. 41, Issue 1

Web References

  • CBS News, 48 Hours http://www.cbsnews.com
  • Internet Movie Database http://www.imdb.com
  • The Twin to Twin Transfusion Syndrome Foundation Inc.www.tttsfoundation.org
  • The Minnesota Twin Family Study http://www.psych.umn.edu/psylabs/mtfs/default.htm