The difference between breasts before and after childbirth is usually characterized by smaller breast size and loose skin. Before giving birth, the estrogen and progesterone levels in a woman’s body increase, which stimulates the development of the mammary glands, so the breasts become bigger, the nipples and areolas increase in size, and the color of the areola gradually deepens due to pigmentation, which is a series of changes in order to adapt to the needs of breastfeeding after childbirth. The decrease in estrogen level after childbirth leads to a decrease in the size of the breasts compared to the pre-birth period and loose skin, which is generally a normal physiological phenomenon. After giving birth, women can eat more collagen-rich foods such as sea cucumbers and pig’s trotters, keep their breasts clean and hygienic, and be in a happy mood, which will help to improve the health of pregnant women and promote the recovery of breasts.