Twins

Identical Twins

When two fetuses are carried simultaneously and delivered by a woman, it is termed a twin birth. Most multiple births are twins. In 1997, 94% of multiple births reported were twins. However, most of these twin births were fraternal or nonidentical twins. Twins referred to as identical or paternal twins (also known as monozygotic or

Fraternal Twins

When two fetuses are carried simultaneously and delivered by a woman, it is termed a twin birth. Most multiple births are twins. In 1997, 94% of multiple births reported were twins. The numbers of twin, triplet, and higher-order multiple births have climbed at an unprecedented rate during the past 20 years. Between 1980 and 1997