Fraternal. More than 30% are monozygotic twins and nearly 70% are dizygotic. http://www.bjmg.edu.mk/record.asp?subrecordid=571 http://www.Sogc.Org/health/pregnancy-multiple_e.Asp.
Yes. Fraternal twins are 3 times as frequent as identical. Fraternal twins happen when there is double ovulation and 2 eggs get fertilized. They are the type of twins that run in families. Identical twins come from 1 fertilized egg which separate in early gestation. Depending on when they separate, the babies can be in 2 distinct sac (di/di), 2 sacs within a shared sac (mono/di) or 1 sac (mono/mono).