A little bit of itching during pregnancy can be a sign of changing hormones. But excessive, chronic itching is a sign of something more serious like obstetric cholestasis (OC) which is a problem with the liver. This needs immediately medical attention because it puts both the mother and the child at risk. So ladies, if any of you are itching so much that you are tearing your skin, please see your doctor and have some blood tests done.
A friend of mine had this and had to have an immediate C-section. She had a constant terrible itch. Thankfully, she took it seriously and saw the doctor in time.