Recent Forum Topics

• 17 Twin Facts

  By TwinSociety

  In Amazing Twin Facts

  June 13, 2011
  1.   4.5 million twin individuals live in the United S...  more1.   4.5 million twin individuals live in the United States today or about 2 percent of the general population.2.   An additional 90,000 sets (180,000 individuals) are born each year.3.   Twins (and other multiple births) are on the rise. There were 33 percent more in 1988 than in 1978.   4.   Prematurity is a major reason multiples have a higher rate of birth defects and neonatal death.5.   Some thirty percent of multiples are born six weeks premature, or before 30 weeks of gestation.  This figure is 10 times higher than their proportion in the population at large.6.   Twins perinatal mortality rate is 5 times greater than babies born singly.7.   Twins and other multiples represent  nearly 20 percent of extremely low birth weight infants.8.   Nearly 25 percent of the twins born today are not expected until days or moments before their births.9.   For the second-born twin the mortality rate at birth a...    less
• Fraternal Twin Facts

  By TwinSociety

  In Fraternal Twins

  April 28, 2011
  Fraternal Twins in medical terms are called Dizygotic Twins: di = two and zygote = one sperm and one egg cell. In other words, Fraternal Twins originate from two separate eggs.
  Fraternal Twins are the most common of all twin babies and happen about 66% to 75% of the time. Unlike identical twins, fraternal twins are no more genetically similar than any two siblings with the same biological parents.
  Combination of Fraternal Twins:
  Boy and Boy...  moreFraternal Twins in medical terms are called Dizygotic Twins: di = two and zygote = one sperm and one egg cell. In other words, Fraternal Twins originate from two separate eggs.
  Fraternal Twins are the most common of all twin babies and happen about 66% to 75% of the time. Unlike identical twins, fraternal twins are no more genetically similar than any two siblings with the same biological parents.
  Combination of Fraternal Twins:
  Boy and Boy
  Girl and Girl
  Boy and Girl
  
  Frecuency per race:
  Asian                     1 in 500
  Cacausian             1 in 125
  African                  1 in 20 in some populations
  Other Facts:
  The babies have two placentas that can sometimes fuse into one.
  Fertility drugs make you more likely to conceive fraternal twins.
  Once you have had a set of fraternal twins, you are twice as likely to have another set in ...    less
• Biolgical Twin Clocks

  By TwinSociety

  In Amazing Twin Facts

  April 28, 2011
   
  As twins, our biological clocks are equally affected in t...  more 
  As twins, our biological clocks are equally affected in the flow of time. Consider a set of twins and suppose that one twin goes to live on the top of a mountain while the other stays at sea level. The first twin ages faster than the second. Thus, if they meet again, one would be older than the other. In this case, the difference in ageswould be very small and not as significant but it would be much larger if one of the twins went for a long trip in a spaceship in which he accelerated to nearly the speed of light.
   
  When he returned, he would be much younger than the one who stayed on earth. This is known as the Twins Paradox.  less