How old is the baby at 38 weeks of pregnancy

The size of the child at 38 weeks of pregnancy is about 50cm in length and about 3000-3500g in weight, and there will be differences between individuals, not absolutely.
38 weeks pregnant is the stage of late pregnancy, at this time the fetus length of about 50cm, weight about 3000-3500g, biparietal diameter of about 9.08 ± 0.59cm, abdominal circumference of about 30.63 ± 2.83cm, femur length of about 7.20 ± 0.43cm.
38 weeks pregnant fetus originally covered with a layer of fine velvet and white fetal fat will gradually fall off, disappear, the baby’s skin will become smoother, skin wrinkles will slowly disappear, these shed secretions will be swallowed with the amniotic fluid together with the fetus into the stomach, in the intestinal tract gradually turned black, the fetus was born and discharged that is, fetal stool.
The fetus is full term at 38 weeks of pregnancy, observe whether there are any signs of labor, and get ready for labor.