Miscarriages & Natural abortions as a result of evil beings?

There is a belief in my country that Miscarriages & Natural abortions can happen as a result of evil beings taking revenge from someone. I recently heard a story from a teacher of mine that some couple visited him about a series of Miscarriages because they had a suspicion about it. He is a Famous monk in my country and he does not have any reputation for doing such Exorcism stuff, But as a monk he could not turn two troubled people away so he started reciting dhamma hoping something would come up. As my teacher said then the lady started acting strange and like in those movies she talked like a completely another person. My teacher said that she told them the story's beginning. So long story short ; she was pregnant in the earlier part of their marriage and they did not wanted a child back then so they took an abortion and that dead child is now haunting them as a being from Yakkha or Pretha realm. --- What is the teaching has to say about these kind of things? If these things actually happen what can a person do?