A woman’s pregnancy is counted as one gestational month every four weeks, so the seventh month of pregnancy is usually about 28 weeks of pregnancy. Generally pregnancy is calculated from the first day of the last menstrual period and the due date is calculated as the month of the last menstrual period minus 3 or plus 9 and the date plus 7. For lunar dates, add 14 and divide the actual number of days of pregnancy by 7 to get the exact week of pregnancy. In addition, if a woman does not usually have regular menstruation, this can be estimated by ultrasound examination. Ultrasound examinations in the early stages of pregnancy can reveal the size of the gestational sac and the location of the bed. In addition, when a woman starts to have a late pregnancy at 28 weeks of pregnancy, she needs to have a biweekly checkup to understand the development of the fetus in the womb through ultrasound. It is also important for pregnant women to avoid sexual intercourse, to avoid changes in the vaginal environment and to reduce the risk of vaginal inflammation, which can lead to premature rupture of membranes and preterm labor. In addition, for pregnant women in the 7th month of pregnancy, it is recommended to elevate the lower limbs at night to help eliminate edema, and to pay attention to strengthening nutrition, adding more protein and having regular maternity checkups.