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 ...

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 ...

What's better than snuggling up with your baby bundle? How about snuggling up with two (or more!) bundles at the same time? Whether you're pregnant with multiples — or you know someone who is ...