Characteristics and reactions within 7 days of pregnancy Within 7 days of pregnancy, although the fetus has not yet formed, physiological changes have already occurred, and pregnant women may experience various reactions. The following is a detailed explanation from 4 aspects. 1. Changes in physical signs Within 7 days of pregnancy, the pregnant woman’s physical signs are not obvious, but there will still be some changes. The most common change is breast changes, with marks of varying shades appearing on the skin around the nipples. In addition, due to hormonal levels