When spirits of children come into your world to share messages with you, they are doing so from their spirit vantage point. They are able to communicate to those who are open to their energy. Once they are born, they may no longer be able to share such information. The spirit communicating with you has nothing to do with whether the child is going to be psychic or not. All you know is they are passing on messages to you from the uterus.
Most spirits are aware of the life that they are coming into and they are aware how things will progress. They have chosen the aspects that they are coming into.