Clinically, 7 days is 1 week from the 1st day of a woman’s last menstrual period, and 1 gestational month is 4 weeks, so 7 months of pregnancy is generally 28 weeks. The 7th month of pregnancy is the full 28 weeks, the beginning of the 29th week, at this time has entered the late pregnancy, due to the increase in blood volume, the uterus increases, pregnant women will feel discomfort, such as the uterus increases to compress the inferior vena cava, so that the lower limb venous return is not good, there will be lower limb edema and other conditions. At this time, pregnant women must strengthen nutrition and add more protein, which is conducive to the relief and recovery of edema. At the same time, pregnant women need to have a maternity checkup once every 2 weeks, in addition to ultrasound examination to understand the intrauterine development of the fetus, they also need to have routine blood tests to understand whether the pregnant women have physiological anemia and other conditions. In addition, pregnant women should not have sexual intercourse from 28 weeks of pregnancy onwards, in order to avoid changes in the vaginal environment before and after sexual intercourse, which may cause vaginal inflammation and then retrograde infection, resulting in the risk of premature rupture of fetal membranes and preterm delivery.