Is 28 weeks normal?

Placenta is graded according to maturity. It is divided into 4 grades, namely grade 0, grade 1, grade 2 and grade 3. The placental function grade corresponding to different gestational weeks should be consistent. Grade 1 placenta at 28 weeks is normal. If it shows grade 2 or even grade 3 performance, then it is necessary to consider the aging of placental function. Of course, whether the placenta is aging or not needs to be judged in combination with other test results. For example, it is necessary to check the values of estriol in pregnant women's urine and placental lactogen in pregnant women's serum, which can indicate whether there is low placental function. In addition, pregnant women should carry out fetal movement counting by themselves. Abnormal fetal movement can also indicate a decline in placental function. Oxytocin provocation test and fetal heart monitor and B ultrasound combined with biophysical monitoring can also indicate placental function.