Early pregnancy symptoms and their appearance time Will there be early pregnancy symptoms if the pregnancy is less than one month old? This is a question that women often face when trying to conceive or in the early stages of pregnancy. Early pregnancy reactions refer to a set of physiological and psychological changes that occur within a certain period of time before and after pregnancy, including nausea, vomiting, breast tenderness, fatigue, etc. According to surveys, about 70% of pregnant women will experience early pregnancy reactions in the early stages of pregnancy. It is generally believed that early pregnancy reactions occur around 5-6 weeks of pregnancy, but some women do not have early pregnancy reactions in the early stages of pregnancy. Below we introduce in detail the symptoms of early pregnancy and when they appear. Early pregnancy reaction 1: Pregnancy reaction occurs in the early stages of pregnancy.