Nine months of pregnancy is 39 weeks, is close to the expected date of delivery, belongs to the late stage of pregnancy, at this time the function of the placenta and amniotic fluid has matured, at any time there is the possibility of seizure. The fetus at 39 weeks of pregnancy belongs to the full-term baby, the fetus each organ system has been developed and mature, subcutaneous fat, skin texture normal appearance, male fetus testicles have been normal descending to the scrotum, female fetus vulva has also been well developed. At this time, the normal fetal weight is around 3 kg and length is around 50 cm. After birth, they are able to suck well, establish independent breathing, cry loudly and have a high survival rate. During the 39th week of pregnancy, you need to pay attention to the labor and delivery checkups on time, every 3-5 days, and each time you must do fetal heart rate monitoring, urinalysis, blood pressure, and weight. Pay attention to the signs of labor and be prepared for hospitalization. If there is regular abdominal pain, vaginal discharge or vaginal redness, you should be hospitalized immediately.