The first time I heard the twins’ heartbeats, they were quite different. One was more rapid than the other, and my doctor laughed heartily. “They’ll have totally different personalities,” she explained to me.
It turns out that it wasn’t a joke: they had different personalities right out of the womb. My husband describes looking down at our hour-old newborns and thinking how one seemed alert, curious, and full of beans, while the other seemed helpless, her little hat slipped in front of her eyes, quietly pouting. From the outset, one twin has seemed like a tiny adult, raring to go and get into trouble, anxious to crawl away, while the other happy to be a roly-poly baby, able to explore simple toys for ages.
These personalities are still who they are today.