What is the most common type of multiple births?

The most common type of multiple births is twins, specifically dizygotic (fraternal) twins, which occur when two separate eggs are fertilized by two separate sperm cells. This type of twin birth is more common than monozygotic (identical) twins, where a single fertilized egg splits into two embryos. Factors such as maternal age, genetics, and the use of fertility treatments can influence the likelihood of having twins.