In early pregnancy, the changes in a woman's breasts are due to an increase in estrogen, which promotes the development of mammary ducts and the accumulation of fat, while progesterone promotes the development of mammary alveoli. Prolactin, growth hormone, insulin, cortisol, and epidermal growth factor also work together to differentiate stem cells into alveolar cells and myoepithelial cells. This often results in women noticing gradually enlarging breasts and feeling breast tenderness during physical examinations. Therefore, it is normal for women to experience breast tenderness in the affected areas, and the disappearance of this tenderness is also normal. If you are concerned, you can further visit a hospital for an examination to rule out any organic changes in the breast tissue. Follow the advice and proper diagnoses of doctors. If you have further questions, please consult a doctor at the hospital for more information.