Level 1: Causes of insomnia in pregnant women Insomnia in pregnant women is a common phenomenon, especially in the third trimester of pregnancy. The main reasons include: physical discomfort, hormonal changes, anxiety and stress. Because the body is undergoing many changes, pregnant women may experience discomfort, such as heartburn, back pain, etc., which can affect sleep. Hormonal changes are also one of the causes of insomnia in pregnant women, especially