a twin(= either of two children born to the same mother on the same occasion) who do not look exactly the same because they developed from two separate eggs
As fraternal twins they're close, but different.
Women age 35 to 40 are three times more likely than younger women to have fraternal twins.
Synonym: non-identical twin
Compare: dizygoticidentical twinmonozygotic
更多例句
Julia is pregnant with fraternal twins.
Was she an identical or fraternal twin?
With fraternal twins, there are two eggs simultaneously fertilized by two sperm, resulting in two genetically distinct children.