Fraternal or dizygotic twins develop from two different eggs fertilized by separate sperm; they generally share about 50 percent of their genes. Therefore, fraternal twins are essentially like ...

Fraternal twins in the womb are like siblings living in the same house, but they each have their own room with a mini fridge. - Carolina Bibbo, M.D., maternal-fetal medicine specialist There's no ...

About 23 in every 1000 births are fraternal, a much higher rate than the three or four out of 1000 births for identical twins. Examining each twin’s DNA will reveal whether they are identical or ...