1. Causes of Cough in Pregnant Women There are many reasons for cough in pregnant women, the most common ones are caused by respiratory diseases such as colds, flu, and pneumonia. In addition, allergic rhinitis, asthma and other diseases can also cause cough symptoms in pregnant women. In addition, due to the decline of the body\’s immunity during pregnancy, it is easy to be infected with various bacteria and viruses, and it is also easy to cause cough. 2. Cough in pregnant women