There will be no visible reaction to a new pregnancy. It takes about a week for the sperm and egg to unite and form a fertilized egg, which takes about a week to enter the endometrium. At this time, the concentration of chorionic gonadotropin in a woman’s body begins to rise and clinical symptoms can appear, such as a feeling of heaviness in the breasts, enlargement and deepening of the nipples and areolas, and the appearance of Montserrat nodules, most of which occur more than 10 days after pregnancy. The reactions of early pregnancy are as follows: 1. Breast changes: 4-6 weeks after pregnancy, women’s breasts begin to increase in size and become sensitive, and can show enlarged nipples, obvious subcutaneous veins in the breasts, prominent nipples, and even tingling and swelling of the breasts, and occasionally a small amount of milk can be squeezed out; 2. Early pregnancy reaction: after menopause, pregnant women will experience an abnormal state of digestive system and spirit, called early pregnancy reaction. The earliest symptom is fear of cold, and as the number of days of pregnancy increases, digestive system symptoms such as loss of appetite, aversion to greasy, acidic food, nausea and vomiting will gradually appear, and the symptoms of nausea and vomiting will appear as soon as 5 weeks, and will be accompanied by general symptoms such as fatigue, drowsiness and lethargy; 3.