How Twins and Triplets Form

Identical twins form when one fertilized egg splits into two embryos.
Fraternal twins come from two separate eggs fertilized by two sperm.
Triplets can be a mix of identical and fraternal combinations.
Genetics and fertility treatments increase the chances of multiples.
The uterus adapts to support more than one baby at once.
Identical twins share the same DNA but can develop unique personalities.
Fraternal twins are genetically just like siblings born at different times.
Multiples are more common today thanks to assisted reproduction.
Twin pregnancies often require closer medical monitoring.
Multiple births are nature’s rare yet fascinating variations on reproduction.