This could be used as evidence for those who believe our lives are pre-planned. From an article on msn:
"Fertility treatments can result in multiple embryos — and babies. So the couple decided to go with in vitro fertilization. And, instead of having several embryos implanted in her womb, she decided to have just one.
But nature had other plans, and the single embryo that was implanted in her uterus split once to produce twins, and one of the two split again to produce identical triplets."
I guess they were meant to have more than one child.
The full article can be read here.