What are the reactions in early pregnancy? Pregnancy is a life stage that every woman goes through, but everyone\’s reaction to pregnancy may be different. In the early stages of pregnancy, the body will have many different reactions, which can be very distressing. This article will give you a detailed explanation from four aspects including pregnancy reactions, gastrointestinal system, skin changes, and emotional changes. Pregnancy Reactions: Some women experience flu or cold symptoms in the first few weeks of pregnancy.