Fraternal twins or dizygotic twins
Same Same but Different
Pregnancy start when a sperm fertilises an egg. This fertilised egg is called a zygote. Usually one egg is released from a ovary but sometimes a woman’s ovary might release two eggs. These two eggs are fertilised by two separate sperms. Thus two zygotes are formed resulting in conception of twins. These twins are called fraternal twins or dizygotic twins (meaning two zygotes) or non-identical twins. The placenta provides oxygen and nutrients to the developing babies inside the womb. These twins have separate placentas and umbilical cords. The technical name for this is dichorionic. Fraternal twins can be of the same or opposite sex and their genes are different.