Fraternal twin
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- A woman who is herself a fraternal twin is 2.
- If the second fraternal twin is not available for testing then the laboratory may opt to run additional testing if the need arises.
- The risk for developing MS in an unaffected fraternal twin is 2%, and the risk in an identical twin is 25-30%.
- Fraternal twin boys in the tub Twins in animal biology is a case of multiple birth in which the mother gives birth to two offspring from the same pregnancy.
- Fraternal Twins When two eggs are independently fertilized by two different sperm cells, fraternal twins result.
- This differs from fraternal twins, where two eggs (ova) are fertilised by two sperm and produce two genetically unique children, who are no more alike than individual siblings born at different times.
- Karen Fitch, Stanford UniversityMy father is an identical twin and my husband's grandfather is a fraternal twin.
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